#1B581F
Closest named color: Deep Green (#02590F). oklch(40.7% 0.108 144.3), rgb(27, 88, 31).
Aa
White text reads best on this color (8.52:1).
About this color
#1B581F is a dark, moderately saturated green. In OKLCH its lightness is 41%, its chroma 0.108 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Deep Green (#02590F), ΔE 0.021 away. White text reads best on it, at 8.52:1.
| Hue family | Greens |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.108) |
| Temperature | in between |
| Nearest name | Deep Green (#02590F) |
| Black text | 2.46:1 |
| White text | 8.52:1 |
Values
| HEX | #1B581F |
| RGB | rgb(27, 88, 31) |
| HSL | hsl(124, 53%, 23%) |
| OKLCH | oklch(40.7% 0.108 144.3) |
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 #1B581F | 8.52:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #1B581F | 2.46:1 | Fails | Lc 15.0 | Not readable |
| #1B581F text on white | 8.52:1 | AAA | Lc 89.0 | Fine for body text |
| #1B581F text on black | 2.46:1 | Fails | Lc -13.2 | 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 800.
-
Step 50
50
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E3EDE2
oklch(93.6% 0.018 142.8)
-
Step 200
200
#CCE0CB
oklch(88.6% 0.036 144)
-
Step 300
300
#A8CCA7
oklch(80.9% 0.064 144.3)
-
Step 400
400
#78B178
oklch(70.6% 0.101 144.4)
-
Step 500
500
#539D55
oklch(63% 0.129 144.4)
-
Step 600
600
#348839
oklch(55.7% 0.141 144.4)
-
Step 700
700
#26732B
oklch(49.2% 0.131 144.3)
-
Step 800
800 (this color)
#1B581F
oklch(40.7% 0.108 144.3)
-
Step 900
900
#214D23
oklch(37.7% 0.085 144.5)
-
Step 950
950
#142D15
oklch(26.9% 0.053 144.7)
#1B581F 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) | #5A5019 | 0.080 |
| Deuteranopia (no green cones) | #524A24 | 0.081 |
| Tritanopia (no blue cones) | #0C564C | 0.067 |
| Achromatopsia (no color) | #4C4C4C | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B581F
#1B581F
oklch(40.7% 0.108 144.3)
- #66326A
#66326A
oklch(40.8% 0.109 324.6)
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 #1B581F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Green #02590F ΔE 0.021
- Forest #0B5509 ΔE 0.023
- Navy Green #35530A ΔE 0.026
- Spruce #0A5F38 ΔE 0.032
- Pine #2B5D34 ΔE 0.034
- Dark Green #006400 ΔE 0.049
- Bottle Green #044A05 ΔE 0.052
- Darkgreen #054907 ΔE 0.055
Use #1B581F 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.