#51551F
Closest named color: Green Brown (#544E03). oklch(43.4% 0.076 113.1), rgb(81, 85, 31).
Aa
White text reads best on this color (7.86:1).
About this color
#51551F is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.076 and its hue 113°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Green Brown (#544E03), ΔE 0.024 away. White text reads best on it, at 7.86:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.076) |
| Temperature | in between |
| Nearest name | Green Brown (#544E03) |
| Black text | 2.66:1 |
| White text | 7.86:1 |
Values
| HEX | #51551F |
| RGB | rgb(81, 85, 31) |
| HSL | hsl(64, 47%, 23%) |
| OKLCH | oklch(43.4% 0.076 113.1) |
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 #51551F | 7.86:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #51551F | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #51551F text on white | 7.86:1 | AAA | Lc 87.2 | Fine for body text |
| #51551F text on black | 2.66:1 | Fails | Lc -14.9 | 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
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#EAEBE1
oklch(93.7% 0.013 111.3)
-
Step 200
200
#D9DBC9
oklch(88.5% 0.024 112)
-
Step 300
300
#C0C4A4
oklch(80.9% 0.044 113.2)
-
Step 400
400
#A0A672
oklch(70.7% 0.071 113.6)
-
Step 500
500
#8A8F4C
oklch(63% 0.09 112.5)
-
Step 600
600
#74792E
oklch(55.6% 0.098 112.7)
-
Step 700
700
#616621
oklch(49.1% 0.091 113.2)
-
Step 800
800 (this color)
#51551F
oklch(43.4% 0.076 113.1)
-
Step 900
900
#42451E
oklch(37.8% 0.059 112.8)
-
Step 950
950
#262812
oklch(26.8% 0.037 113.1)
#51551F 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) | #5B5119 | 0.018 |
| Deuteranopia (no green cones) | #5B5222 | 0.020 |
| Tritanopia (no blue cones) | #565049 | 0.066 |
| Achromatopsia (no color) | #525252 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51551F
#51551F
oklch(43.4% 0.076 113.1)
- #524877
#524877
oklch(43.3% 0.077 292.7)
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 #51551F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Brown #544E03 ΔE 0.024
- Army Green #4B5D16 ΔE 0.030
- Olive Brown #645403 ΔE 0.033
- Camouflage Green #4B6113 ΔE 0.042
- Mud Brown #60460F ΔE 0.047
- Navy Green #35530A ΔE 0.048
- Camo Green #526525 ΔE 0.048
- Pine #2B5D34 ΔE 0.049
Use #51551F 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.