#1B5121
Closest named color: Forest (#0B5509). oklch(38.7% 0.096 145.4), rgb(27, 81, 33).
Aa
White text reads best on this color (9.35:1).
About this color
#1B5121 is a dark, moderately saturated green. In OKLCH its lightness is 39%, its chroma 0.096 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest (#0B5509), ΔE 0.030 away. White text reads best on it, at 9.35:1.
| Hue family | Greens |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.096) |
| Temperature | in between |
| Nearest name | Forest (#0B5509) |
| Black text | 2.24:1 |
| White text | 9.35:1 |
Values
| HEX | #1B5121 |
| RGB | rgb(27, 81, 33) |
| HSL | hsl(127, 50%, 21%) |
| OKLCH | oklch(38.7% 0.096 145.4) |
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 #1B5121 | 9.35:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #1B5121 | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #1B5121 text on white | 9.35:1 | AAA | Lc 91.3 | Preferred for body text |
| #1B5121 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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E2EEE2
oklch(93.7% 0.02 145.4)
-
Step 200
200
#C9E1C9
oklch(88.5% 0.041 145.2)
-
Step 300
300
#A4CEA5
oklch(81% 0.072 145.5)
-
Step 400
400
#70B473
oklch(70.8% 0.116 145.2)
-
Step 500
500
#45A04E
oklch(63.1% 0.147 145.4)
-
Step 600
600
#1C8A30
oklch(55.5% 0.16 145.5)
-
Step 700
700
#097522
oklch(49% 0.149 145.4)
-
Step 800
800
#10601E
oklch(42.8% 0.124 145.3)
-
Step 900
900 (this color)
#1B5121
oklch(38.7% 0.096 145.4)
-
Step 950
950
#102E13
oklch(27% 0.06 145.6)
#1B5121 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) | #52491D | 0.073 |
| Deuteranopia (no green cones) | #4C4525 | 0.073 |
| Tritanopia (no blue cones) | #0F4F46 | 0.058 |
| Achromatopsia (no color) | #474747 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5121
#1B5121
oklch(38.7% 0.096 145.4)
- #5D3060
#5D3060
oklch(38.7% 0.095 324.9)
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 #1B5121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest #0B5509 ΔE 0.030
- Navy Green #35530A ΔE 0.032
- Pine Green #0A481E ΔE 0.034
- Deep Green #02590F ΔE 0.037
- Bottle Green #044A05 ΔE 0.037
- Darkgreen #054907 ΔE 0.038
- British Racing Green #05480D ΔE 0.039
- Evergreen #05472A ΔE 0.043
Use #1B5121 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.