#1B5301
Closest named color: Forest (#0B5509). oklch(39% 0.121 138.8), rgb(27, 83, 1).
Aa
White text reads best on this color (9.19:1).
About this color
#1B5301 is a dark, moderately saturated green. In OKLCH its lightness is 39%, its chroma 0.121 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest (#0B5509), ΔE 0.009 away. White text reads best on it, at 9.19:1.
| Hue family | Greens |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Forest (#0B5509) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #1B5301 |
| RGB | rgb(27, 83, 1) |
| HSL | hsl(101, 98%, 16%) |
| OKLCH | oklch(39% 0.121 138.8) |
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 #1B5301 | 9.19:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #1B5301 | 2.28:1 | Fails | Lc 13.2 | Not readable |
| #1B5301 text on white | 9.19:1 | AAA | Lc 90.8 | Preferred for body text |
| #1B5301 text on black | 2.28:1 | Fails | Lc -11.5 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E1EEDE
oklch(93.5% 0.025 139.8)
-
Step 200
200
#C9E2C2
oklch(88.6% 0.051 138.9)
-
Step 300
300
#A3CF96
oklch(80.8% 0.091 138.6)
-
Step 400
400
#6FB659
oklch(70.8% 0.146 138.7)
-
Step 500
500
#43A21C
oklch(63.1% 0.186 138.9)
-
Step 600
600
#318900
oklch(55.5% 0.174 138.8)
-
Step 700
700
#287400
oklch(49.2% 0.155 138.8)
-
Step 800
800
#1F5F00
oklch(42.7% 0.134 138.9)
-
Step 900
900 (this color)
#1B5301
oklch(39% 0.121 138.8)
-
Step 950
950
#0F2F05
oklch(27.1% 0.077 139.2)
#1B5301 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) | #564A00 | 0.081 |
| Deuteranopia (no green cones) | #4F460D | 0.079 |
| Tritanopia (no blue cones) | #145045 | 0.083 |
| Achromatopsia (no color) | #484848 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5301
#1B5301
oklch(39% 0.121 138.8)
- #5F2A6D
#5F2A6D
oklch(38.8% 0.122 318.8)
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 #1B5301, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest #0B5509 ΔE 0.009
- Deep Green #02590F ΔE 0.019
- Navy Green #35530A ΔE 0.029
- Bottle Green #044A05 ΔE 0.035
- Darkgreen #054907 ΔE 0.039
- British Racing Green #05480D ΔE 0.043
- Racing Green #014600 ΔE 0.049
- Pine Green #0A481E ΔE 0.050
Use #1B5301 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.