#AF231B
Closest named color: Rufous (#AE2012). oklch(49.1% 0.177 28.8), rgb(175, 35, 27).
Aa
White text reads best on this color (6.82:1).
About this color
#AF231B is a medium-dark, vivid red. In OKLCH its lightness is 49%, 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 0.007 away. White text reads best on it, at 6.82:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #AF231B |
| RGB | rgb(175, 35, 27) |
| HSL | hsl(3, 73%, 40%) |
| OKLCH | oklch(49.1% 0.177 28.8) |
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 #AF231B | 6.82:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #AF231B | 3.07:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #AF231B text on white | 6.82:1 | AA | Lc 81.9 | Fine for body text |
| #AF231B text on black | 3.07:1 | AA large text | Lc -20.0 | 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
#E97D6E
oklch(70.7% 0.136 29.2)
-
Step 500
500
#DF5547
oklch(63% 0.175 28.8)
-
Step 600
600
#CB3328
oklch(55.6% 0.19 28.9)
-
Step 700
700 (this color)
#AF231B
oklch(49.1% 0.177 28.8)
-
Step 800
800
#8E2019
oklch(42.7% 0.147 28.7)
-
Step 900
900
#72221B
oklch(37.7% 0.114 28.6)
-
Step 950
950
#431510
oklch(26.9% 0.073 29)
#AF231B 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) | #504718 | 0.191 |
| Deuteranopia (no green cones) | #726612 | 0.174 |
| Tritanopia (no blue cones) | #C10023 | 0.040 |
| Achromatopsia (no color) | #5B5B5B | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AF231B
#AF231B
oklch(49.1% 0.177 28.8)
- #006E7A
#006E7A
oklch(49.2% 0.085 207.9)
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 #AF231B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.007
- Firebrick #B22222 ΔE 0.009
- Rust Red #AA2704 ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.021
- Brown #A52A2A ΔE 0.022
- Scarlet #BE0119 ΔE 0.032
- Brick #A03623 ΔE 0.035
- Burnt Red #9F2305 ΔE 0.037
Use #AF231B 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.