Blue and yellow make green — the first mix everyone learns, and the one where the choice of blue quietly decides everything. A violet-leaning blue gives a muted, natural green; a cyan-leaning blue gives a vivid one; more yellow slides toward chartreuse and more blue toward teal. Every swatch below is the computed blend, not a photo.
→blue and yellow in paint#008000
Try the blend yourself
Ratio 1 : 1 · 50 / 50
#6cabc7
HEX
#6cabc7
RGB
rgb(108, 171, 199)
HSL
hsl(198, 45%, 60%)
CMYK
cmyk(46%, 14%, 0%, 22%)
Blend path between your colors
color-mix(in oklab, #0000ff 50%, #ffff00)
Why blue and yellow make green at all
Green is a primary color of light — your screen does not mix it, it just fires the green pixel. Paint has no such shortcut: green pigment has to come from a blend, and blue plus yellow is the route. It works by subtraction. Blue pigment absorbs the red and orange end of the spectrum, yellow pigment absorbs the violet and blue end, and the band they both leave alone is green. That surviving band is the color you see.
Because the mix depends on what each pigment lets through, the specific blue matters more than the ratio. A violet-leaning blue (ultramarine) leaks a little red, so the green arrives muted and natural — think sage and moss. A cyan-leaning blue (phthalo) leaks nothing warm, so the green comes out vivid and cold. The routes below start where a painter starts: blue worked into a yellow base for the classic blend, then green as the hub, with yellow, blue, black and white walking it to chartreuse, teal, forest and sage.
Five routes, computed
Every result below is computed in a perceptual color space: the swatch is the blend your
eye sees, with the HEX code next to it. Click any code to copy it.
Blue into yellow (the painter's route)
Work blue into a yellow base — twice the yellow — for the classic fresh green.
azure blueyellow→Light Green
This is how the mix is actually done at a palette: blue goes into yellow, a little at a time, never the reverse. Equal parts overshoot into a dull grayish middle on most pigments — and on a screen, a 50/50 blue-and-yellow blend washes out to a pale blue instead of green at all, because light adds toward white. Paint is the process that makes green.
Green + yellow (the chartreuse route)
Start from green and lean yellow for lime, chartreuse and spring green.
greenyellow→Yellow Green
The cleanest way to a vivid yellow-green: green already sits where you want to be, and yellow just walks it toward lime. It is also the fix when a blue-and-yellow mix refuses to get bright — restart from a green pigment instead of fighting the wash-out.
Green + blue (the teal route)
Lean the other way for teal, sea green and spruce.
greenazure blue→Dark Cyan
Blue-heavy greens read cool and calm — the spa-and-deep-forest end of the family. In real tubes, a cyan-leaning blue (phthalo) gives the crispest teal and a violet-leaning one (ultramarine) a moodier, dustier spruce.
Green + black (the forest route)
Shade finished green with a quarter-share of black for forest and pine.
greenblack→Dark Green
The shade route to dark green. Black flattens as it darkens, so stop just before it reads stylized — for natural depth, deepen with extra blue instead and keep black as the final trim.
Green + white (the sage route)
Tint finished green toward sage, mint and pastel.
greenwhite→Dark Sea Green
Sage is green pulled halfway to white, and it is the most-wanted green in interiors for a reason: the white softens everything loud out of it. Equal parts already read sage; mint is the same walk starting from a blue-leaning green.
Practical tips
The blue decides the mood.Ultramarine (violet-leaning) makes muted, natural greens; phthalo (cyan-leaning) makes vivid, cold ones. When a green mix keeps disappointing, change the blue, not the ratio.
Darken with blue for nature, black for style.Extra blue deepens green while keeping it alive — that is how you get natural pine and moss. Black darkens faster but flatter, which suits graphic forest greens and stylized art.
Olive is a bruised green.A whisper of red — green's complement — drags green toward olive and moss. It is the exact same collision that makes brown, just stopped earlier. Useful for earthy palettes, fatal if you wanted vivid.
Screens do not mix green.Green is a primary of light: your monitor fires it directly, no blend involved. That is why digital green looks neon next to any paint — and blue plus yellow light adds toward white, so a screen 50/50 of the two looks washed out rather than green, exactly backwards from paint.
Frequently asked questions
What two colors make green?
Blue and yellow. The blend works by subtraction: blue absorbs the warm end of the spectrum, yellow absorbs the cool end, and the green band in between survives. Equal parts give a middle green; more yellow makes chartreuse, more blue makes teal.
How do you make dark green or forest green?
Two routes: add more blue to deepen while keeping the green alive (natural pine, moss), or shade finished green with a small amount of black (graphic forest green). Blue deepens gently; black hits hard and flattens, so add it in small passes.
How do you make light green, mint, or sage?
Add white. Sage is roughly equal parts green and white; mint is the same tint starting from a blue-leaning green. In frosting and icing the white base builds the tint in for you — one drop of green gel already lands pastel.
How do you make olive green?
Add a touch of red. Red is green's complement, so a small amount bruises the green toward olive and moss without going all the way to brown. A pinch of orange or brown does the same job warmer.
Why do blue and yellow make green instead of just getting darker?
Because the two pigments block different halves of the spectrum. Blue absorbs reds and oranges; yellow absorbs violets and blues. Stack them and the only wavelengths both still reflect are the green band in between — so that is what reaches your eye.