#A91B13
Closest named color: Rufous (#AE2012). oklch(47.4% 0.177 29.2), rgb(169, 27, 19).
Aa
White text reads best on this color (7.36:1).
About this color
#A91B13 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.177 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.013 away. White text reads best on it, at 7.36:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.85:1 |
| White text | 7.36:1 |
Values
| HEX | #A91B13 |
| RGB | rgb(169, 27, 19) |
| HSL | hsl(3, 80%, 37%) |
| OKLCH | oklch(47.4% 0.177 29.2) |
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 #A91B13 | 7.36:1 | AAA | Lc -88.8 | Fine for body text |
| Black text on #A91B13 | 2.85:1 | Fails | Lc 20.3 | Dividers and decoration only |
| #A91B13 text on white | 7.36:1 | AAA | Lc 83.8 | Fine for body text |
| #A91B13 text on black | 2.85:1 | Fails | Lc -18.2 | 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
#F3ACA1
oklch(80.9% 0.086 28.9)
-
Step 400
400
#EA7D6D
oklch(70.8% 0.137 29.6)
-
Step 500
500
#E05546
oklch(63.1% 0.176 29.1)
-
Step 600
600
#CB3327
oklch(55.6% 0.191 29.2)
-
Step 700
700 (this color)
#A91B13
oklch(47.4% 0.177 29.2)
-
Step 800
800
#8E2018
oklch(42.7% 0.147 29)
-
Step 900
900
#72221A
oklch(37.7% 0.114 29.2)
-
Step 950
950
#431510
oklch(26.9% 0.073 29)
#A91B13 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) | #4B420F | 0.192 |
| Deuteranopia (no green cones) | #6D6107 | 0.174 |
| Tritanopia (no blue cones) | #BB001C | 0.038 |
| Achromatopsia (no color) | #565656 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A91B13
#A91B13
oklch(47.4% 0.177 29.2)
- #006875
#006875
oklch(47.4% 0.082 209.7)
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 #A91B13, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.013
- Rust Red #AA2704 ΔE 0.019
- Brown #A52A2A ΔE 0.022
- Burnt Red #9F2305 ΔE 0.023
- Firebrick #B22222 ΔE 0.024
- Auburn #9B2226 ΔE 0.031
- Rusty Red #AF2F0D ΔE 0.033
- Brick #A03623 ΔE 0.036
Use #A91B13 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.