#1B511F
Closest named color: Forest (#0B5509). oklch(38.6% 0.098 144.6), rgb(27, 81, 31).
Aa
White text reads best on this color (9.36:1).
About this color
#1B511F is a dark, moderately saturated green. In OKLCH its lightness is 39%, its chroma 0.098 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest (#0B5509), ΔE 0.028 away. White text reads best on it, at 9.36:1.
| Hue family | Greens |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Forest (#0B5509) |
| Black text | 2.24:1 |
| White text | 9.36:1 |
Values
| HEX | #1B511F |
| RGB | rgb(27, 81, 31) |
| HSL | hsl(124, 50%, 21%) |
| OKLCH | oklch(38.6% 0.098 144.6) |
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 #1B511F | 9.36:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #1B511F | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #1B511F text on white | 9.36:1 | AAA | Lc 91.3 | Preferred for body text |
| #1B511F text on black | 2.24:1 | Fails | Lc -11.0 | Not readable |
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 900.
-
Step 50
50
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE1
oklch(93.7% 0.021 143.2)
-
Step 200
200
#C9E1C9
oklch(88.5% 0.041 145.2)
-
Step 300
300
#A4CEA3
oklch(81% 0.074 144.3)
-
Step 400
400
#70B471
oklch(70.7% 0.118 144.5)
-
Step 500
500
#45A04B
oklch(63% 0.15 144.7)
-
Step 600
600
#1D8A2B
oklch(55.5% 0.163 144.6)
-
Step 700
700
#0A751D
oklch(49% 0.152 144.6)
-
Step 800
800
#10601B
oklch(42.8% 0.126 144.7)
-
Step 900
900 (this color)
#1B511F
oklch(38.6% 0.098 144.6)
-
Step 950
950
#102E12
oklch(27% 0.062 144.9)
#1B511F 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) | #53491A | 0.075 |
| Deuteranopia (no green cones) | #4C4523 | 0.073 |
| Tritanopia (no blue cones) | #104F46 | 0.060 |
| Achromatopsia (no color) | #474747 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B511F
#1B511F
oklch(38.6% 0.098 144.6)
- #5D2F61
#5D2F61
oklch(38.6% 0.098 324.3)
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 #1B511F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest #0B5509 ΔE 0.028
- Navy Green #35530A ΔE 0.031
- Pine Green #0A481E ΔE 0.034
- Deep Green #02590F ΔE 0.035
- Bottle Green #044A05 ΔE 0.036
- Darkgreen #054907 ΔE 0.037
- British Racing Green #05480D ΔE 0.038
- Evergreen #05472A ΔE 0.044
Use #1B511F 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.