#A51808
Closest named color: Burnt Red (#9F2305). oklch(46.4% 0.176 30.5), rgb(165, 24, 8).
Aa
White text reads best on this color (7.68:1).
About this color
#A51808 is a medium-dark, vivid red. In OKLCH its lightness is 46%, its chroma 0.176 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Red (#9F2305), ΔE 0.016 away. White text reads best on it, at 7.68:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Burnt Red (#9F2305) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #A51808 |
| RGB | rgb(165, 24, 8) |
| HSL | hsl(6, 91%, 34%) |
| OKLCH | oklch(46.4% 0.176 30.5) |
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 #A51808 | 7.68:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #A51808 | 2.73:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #A51808 text on white | 7.68:1 | AAA | Lc 84.8 | Fine for body text |
| #A51808 text on black | 2.73:1 | Fails | Lc -17.2 | Dividers and decoration only |
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 700.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F7CEC7
oklch(88.5% 0.048 29.4)
-
Step 300
300
#F3ACA0
oklch(80.9% 0.086 29.8)
-
Step 400
400
#E97D6C
oklch(70.7% 0.137 30.2)
-
Step 500
500
#DF5643
oklch(63% 0.175 30.5)
-
Step 600
600
#CA3423
oklch(55.5% 0.189 30.4)
-
Step 700
700 (this color)
#A51808
oklch(46.4% 0.176 30.5)
-
Step 800
800
#8E2115
oklch(42.7% 0.147 30.3)
-
Step 900
900
#722318
oklch(37.8% 0.114 30.8)
-
Step 950
950
#43160F
oklch(27% 0.072 31.1)
#A51808 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) | #494002 | 0.191 |
| Deuteranopia (no green cones) | #6A5E00 | 0.171 |
| Tritanopia (no blue cones) | #B70017 | 0.039 |
| Achromatopsia (no color) | #535353 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A51808
#A51808
oklch(46.4% 0.176 30.5)
- #006572
#006572
oklch(46.4% 0.08 210.1)
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 #A51808, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Red #9F2305 ΔE 0.016
- Rufous #AE2012 ΔE 0.023
- Rust Red #AA2704 ΔE 0.023
- Auburn #9B2226 ΔE 0.028
- Brown #A52A2A ΔE 0.028
- Carmine #9D0216 ΔE 0.029
- Deep Red #9A0200 ΔE 0.032
- Firebrick #B22222 ΔE 0.035
Use #A51808 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.