#51370E
Closest named color: Dark Olive (#373E02). oklch(35.9% 0.066 74.5), rgb(81, 55, 14).
Aa
White text reads best on this color (11.03:1).
About this color
#51370E is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.066 and its hue 74°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Olive (#373E02), ΔE 0.055 away. White text reads best on it, at 11.03:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.066) |
| Temperature | warm |
| Nearest name | Dark Olive (#373E02) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #51370E |
| RGB | rgb(81, 55, 14) |
| HSL | hsl(37, 71%, 19%) |
| OKLCH | oklch(35.9% 0.066 74.5) |
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 #51370E | 11.03:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #51370E | 1.90:1 | Fails | Lc 8.5 | Not readable |
| #51370E text on white | 11.03:1 | AAA | Lc 95.4 | Preferred for body text |
| #51370E text on black | 1.90:1 | Fails | Lc 0.0 | 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
#F8F5F1
oklch(97.1% 0.006 75.4)
-
Step 100
100
#F0E9E0
oklch(93.7% 0.014 74.4)
-
Step 200
200
#E4D7C6
oklch(88.5% 0.027 74.7)
-
Step 300
300
#D4BD9E
oklch(81% 0.049 75.2)
-
Step 400
400
#BE9A68
oklch(70.8% 0.079 75)
-
Step 500
500
#AE803D
oklch(63.2% 0.101 74.3)
-
Step 600
600
#996816
oklch(55.6% 0.11 74.1)
-
Step 700
700
#825704
oklch(49.2% 0.102 75.2)
-
Step 800
800
#6A470B
oklch(42.7% 0.085 74.5)
-
Step 900
900 (this color)
#51370E
oklch(35.9% 0.066 74.5)
-
Step 950
950
#32230D
oklch(26.9% 0.042 74.9)
#51370E 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) | #403808 | 0.034 |
| Deuteranopia (no green cones) | #463F0F | 0.031 |
| Tritanopia (no blue cones) | #59302F | 0.056 |
| Achromatopsia (no color) | #3C3C3C | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51370E
#51370E
oklch(35.9% 0.066 74.5)
- #233E5F
#233E5F
oklch(35.9% 0.067 254.3)
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 #51370E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Olive #373E02 ΔE 0.055
- Mud Brown #60460F ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.072
- Green Brown #544E03 ΔE 0.073
- Pakistan Green #283618 ΔE 0.073
- Chestnut #742802 ΔE 0.075
- Onyx #343A40 ΔE 0.080
- Purple Brown #673A3F ΔE 0.081
Use #51370E 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.