#21904F
Closest named color: Sea Green (#2E8B57). oklch(57.7% 0.138 152.3), rgb(33, 144, 79).
Aa
Black text reads best on this color (5.16:1).
About this color
#21904F is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.138 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.022 away. Black text reads best on it, at 5.16:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #21904F |
| RGB | rgb(33, 144, 79) |
| HSL | hsl(145, 63%, 35%) |
| OKLCH | oklch(57.7% 0.138 152.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #21904F | 4.06:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #21904F | 5.16:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #21904F text on white | 4.06:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #21904F text on black | 5.16:1 | AA | Lc -34.2 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E1EEE4
oklch(93.7% 0.019 152.8)
-
Step 200
200
#C9E0CE
oklch(88.5% 0.035 152)
-
Step 300
300
#A3CDAD
oklch(80.9% 0.063 152.1)
-
Step 400
400
#6FB382
oklch(70.8% 0.1 152.1)
-
Step 500
500
#429F62
oklch(63.1% 0.128 152.2)
-
Step 600
600 (this color)
#21904F
oklch(57.7% 0.138 152.3)
-
Step 700
700
#00743A
oklch(49% 0.128 152.4)
-
Step 800
800
#0B5F30
oklch(42.7% 0.107 152.2)
-
Step 900
900
#164E2B
oklch(37.8% 0.083 152.3)
-
Step 950
950
#0F2E19
oklch(27.1% 0.054 151.7)
#21904F with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #90834A | 0.118 |
| Deuteranopia (no green cones) | #837A53 | 0.116 |
| Tritanopia (no blue cones) | #008E80 | 0.072 |
| Achromatopsia (no color) | #7E7E7E | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21904F
#21904F
oklch(57.7% 0.138 152.3)
- #A8579D
#A8579D
oklch(57.8% 0.138 332.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #21904F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.022
- Viridian #1E9167 ΔE 0.032
- Kelley Green #009337 ΔE 0.034
- Light Forest Green #4F9153 ΔE 0.034
- Fern Green #548D44 ΔE 0.035
- Forest Green #228B22 ΔE 0.044
- Jungle Green #048243 ΔE 0.045
- Irish Green #019529 ΔE 0.048
Use #21904F in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.