#513739
Closest named color: Charcoal Grey (#3C4142). oklch(36.7% 0.037 14), rgb(81, 55, 57).
Aa
White text reads best on this color (10.73:1).
About this color
#513739 is a dark, muted red. In OKLCH its lightness is 37%, its chroma 0.037 and its hue 14°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.044 away. White text reads best on it, at 10.73:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | muted (0.037) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.95:1 |
| White text | 10.73:1 |
Values
| HEX | #513739 |
| RGB | rgb(81, 55, 57) |
| HSL | hsl(355, 19%, 27%) |
| OKLCH | oklch(36.7% 0.037 14) |
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 #513739 | 10.73:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #513739 | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #513739 text on white | 10.73:1 | AAA | Lc 94.8 | Preferred for body text |
| #513739 text on black | 1.95:1 | Fails | Lc -7.8 | 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#EFE8E8
oklch(93.6% 0.008 17.3)
-
Step 200
200
#E3D5D6
oklch(88.5% 0.016 12.5)
-
Step 300
300
#D2BABB
oklch(81% 0.027 14.9)
-
Step 400
400
#BB9698
oklch(70.8% 0.044 14.6)
-
Step 500
500
#A97C7F
oklch(63.2% 0.056 14.3)
-
Step 600
600
#946468
oklch(55.5% 0.062 13.8)
-
Step 700
700
#7E5357
oklch(49.1% 0.058 13.3)
-
Step 800
800
#674447
oklch(42.7% 0.049 13.7)
-
Step 900
900 (this color)
#513739
oklch(36.7% 0.037 14)
-
Step 950
950
#312223
oklch(27.1% 0.023 14.3)
#513739 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) | #3B3B39 | 0.041 |
| Deuteranopia (no green cones) | #424039 | 0.037 |
| Tritanopia (no blue cones) | #563538 | 0.011 |
| Achromatopsia (no color) | #3E3E3E | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513739
#513739
oklch(36.7% 0.037 14)
- #264545
#264545
oklch(36.6% 0.037 195.7)
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 #513739, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.044
- Purple Brown #673A3F ΔE 0.046
- Onyx #343A40 ΔE 0.052
- Gunmetal #293241 ΔE 0.077
- Charcoal #264653 ΔE 0.078
- Dark Grey Blue #29465B ΔE 0.082
- Dark Blue Grey #1F3B4D ΔE 0.083
- Dark Slate Gray #2F4F4F ΔE 0.083
Use #513739 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.