#A31518
Closest named color: Auburn (#9B2226). oklch(45.9% 0.175 27), rgb(163, 21, 24).
Aa
White text reads best on this color (7.84:1).
About this color
#A31518 is a medium-dark, vivid red. In OKLCH its lightness is 46%, its chroma 0.175 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Auburn (#9B2226), ΔE 0.020 away. White text reads best on it, at 7.84:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Auburn (#9B2226) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #A31518 |
| RGB | rgb(163, 21, 24) |
| HSL | hsl(359, 77%, 36%) |
| OKLCH | oklch(45.9% 0.175 27) |
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 #A31518 | 7.84:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #A31518 | 2.67:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #A31518 text on white | 7.84:1 | AAA | Lc 85.3 | Fine for body text |
| #A31518 text on black | 2.67:1 | Fails | Lc -16.7 | 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 800.
-
Step 50
50
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FDCCC5
oklch(88.6% 0.057 27.7)
-
Step 300
300
#FCA79D
oklch(80.9% 0.102 26.9)
-
Step 400
400
#F57267
oklch(70.6% 0.163 26.9)
-
Step 500
500
#ED423C
oklch(63.1% 0.209 27.1)
-
Step 600
600
#D90017
oklch(55.7% 0.227 27)
-
Step 700
700
#B70012
oklch(49% 0.2 27)
-
Step 800
800 (this color)
#A31518
oklch(45.9% 0.175 27)
-
Step 900
900
#7A1414
oklch(37.7% 0.136 26.8)
-
Step 950
950
#480F0D
oklch(27% 0.087 26.8)
#A31518 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) | #463E16 | 0.191 |
| Deuteranopia (no green cones) | #685C0F | 0.172 |
| Tritanopia (no blue cones) | #B40019 | 0.034 |
| Achromatopsia (no color) | #525252 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A31518
#A31518
oklch(45.9% 0.175 27)
- #00646E
#00646E
oklch(46% 0.079 206.7)
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 #A31518, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Auburn #9B2226 ΔE 0.020
- Carmine #9D0216 ΔE 0.021
- Burnt Red #9F2305 ΔE 0.022
- Brown #A52A2A ΔE 0.027
- Deep Red #9A0200 ΔE 0.028
- Rufous #AE2012 ΔE 0.030
- Blood Red #980002 ΔE 0.033
- Rust Red #AA2704 ΔE 0.033
Use #A31518 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.