#21903C
Closest named color: Kelley Green (#009337). oklch(57.4% 0.156 147.1), rgb(33, 144, 60).
Aa
Black text reads best on this color (5.11:1).
About this color
#21903C is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.156 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelley Green (#009337), ΔE 0.014 away. Black text reads best on it, at 5.11:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Kelley Green (#009337) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #21903C |
| RGB | rgb(33, 144, 60) |
| HSL | hsl(135, 63%, 35%) |
| OKLCH | oklch(57.4% 0.156 147.1) |
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 #21903C | 4.10:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #21903C | 5.11:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #21903C text on white | 4.10:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #21903C text on black | 5.11:1 | AA | Lc -34.0 | 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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E1EEE2
oklch(93.6% 0.021 147.6)
-
Step 200
200
#C9E1CB
oklch(88.6% 0.039 147.6)
-
Step 300
300
#A3CDA7
oklch(80.8% 0.069 147.5)
-
Step 400
400
#6FB477
oklch(70.8% 0.113 147)
-
Step 500
500
#43A053
oklch(63.1% 0.143 147.1)
-
Step 600
600 (this color)
#21903C
oklch(57.4% 0.156 147.1)
-
Step 700
700
#027529
oklch(49% 0.144 147.2)
-
Step 800
800
#0D6023
oklch(42.8% 0.12 147)
-
Step 900
900
#174E22
oklch(37.6% 0.092 147.2)
-
Step 950
950
#0F2E14
oklch(27% 0.06 146.9)
#21903C 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) | #928334 | 0.121 |
| Deuteranopia (no green cones) | #857A43 | 0.120 |
| Tritanopia (no blue cones) | #008D7D | 0.091 |
| Achromatopsia (no color) | #7D7D7D | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21903C
#21903C
oklch(57.4% 0.156 147.1)
- #A752A8
#A752A8
oklch(57.4% 0.156 326.9)
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 #21903C, closest first.
No curated palette has a color within ΔE 0.04 of #21903C.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelley Green #009337 ΔE 0.014
- Forest Green #228B22 ΔE 0.024
- Irish Green #019529 ΔE 0.028
- Emerald Green #028F1E ΔE 0.029
- Fern Green #548D44 ΔE 0.041
- True Green #089404 ΔE 0.042
- Sea Green #2E8B57 ΔE 0.042
- Sap Green #5C8B15 ΔE 0.046
Use #21903C 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.