#00901B
Closest named color: Emerald Green (#028F1E). oklch(56.7% 0.184 144), rgb(0, 144, 27).
Aa
Black text reads best on this color (5.00:1).
About this color
#00901B is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.184 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.004 away. Black text reads best on it, at 5.00:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.184) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #00901B |
| RGB | rgb(0, 144, 27) |
| HSL | hsl(131, 100%, 28%) |
| OKLCH | oklch(56.7% 0.184 144) |
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 #00901B | 4.19:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #00901B | 5.00:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #00901B text on white | 4.19:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #00901B text on black | 5.00:1 | AA | Lc -33.5 | 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
#F1F7F1
oklch(97% 0.01 145.5)
-
Step 100
100
#E1EEE0
oklch(93.6% 0.023 143.4)
-
Step 200
200
#C8E2C6
oklch(88.6% 0.047 143.2)
-
Step 300
300
#A0CF9F
oklch(80.9% 0.083 144.2)
-
Step 400
400
#6AB669
oklch(70.8% 0.133 143.7)
-
Step 500
500
#39A23E
oklch(63% 0.169 144)
-
Step 600
600 (this color)
#00901B
oklch(56.7% 0.184 144)
-
Step 700
700
#007614
oklch(49.1% 0.16 143.9)
-
Step 800
800
#00610F
oklch(42.8% 0.139 144)
-
Step 900
900
#0F5014
oklch(37.8% 0.111 143.9)
-
Step 950
950
#0C2F0E
oklch(27.1% 0.07 144.3)
#00901B 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) | #938100 | 0.134 |
| Deuteranopia (no green cones) | #867829 | 0.134 |
| Tritanopia (no blue cones) | #008C7A | 0.116 |
| Achromatopsia (no color) | #7C7C7C | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00901B
#00901B
oklch(56.7% 0.184 144)
- #A847B2
#A847B2
oklch(56.7% 0.183 323.8)
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 #00901B, closest first.
No curated palette has a color within ΔE 0.04 of #00901B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.004
- Irish Green #019529 ΔE 0.016
- True Green #089404 ΔE 0.016
- Forest Green #228B22 ΔE 0.018
- Kelley Green #009337 ΔE 0.022
- Grass Green #3F9B0B ΔE 0.046
- Dark Grass Green #388004 ΔE 0.047
- Green #008000 ΔE 0.048
Use #00901B 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.