#AF1828
Closest named color: Firebrick (#B22222). oklch(48.5% 0.183 23.2), rgb(175, 24, 40).
Aa
White text reads best on this color (7.03:1).
About this color
#AF1828 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.183 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.016 away. White text reads best on it, at 7.03:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.183) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #AF1828 |
| RGB | rgb(175, 24, 40) |
| HSL | hsl(354, 76%, 39%) |
| OKLCH | oklch(48.5% 0.183 23.2) |
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 #AF1828 | 7.03:1 | AAA | Lc -87.6 | Fine for body text |
| Black text on #AF1828 | 2.98:1 | Fails | Lc 21.5 | Dividers and decoration only |
| #AF1828 text on white | 7.03:1 | AAA | Lc 82.5 | Fine for body text |
| #AF1828 text on black | 2.98:1 | Fails | Lc -19.4 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FBE4E2
oklch(93.7% 0.025 23.6)
-
Step 200
200
#F8CDCA
oklch(88.4% 0.049 22.8)
-
Step 300
300
#F5AAA6
oklch(80.9% 0.089 22.6)
-
Step 400
400
#EC7A76
oklch(70.8% 0.141 23.4)
-
Step 500
500
#E25153
oklch(63.2% 0.181 23.1)
-
Step 600
600
#CD2C37
oklch(55.6% 0.196 23.3)
-
Step 700
700 (this color)
#AF1828
oklch(48.5% 0.183 23.2)
-
Step 800
800
#901B24
oklch(42.8% 0.152 23)
-
Step 900
900
#731F22
oklch(37.6% 0.117 22.9)
-
Step 950
950
#441414
oklch(27% 0.074 23.5)
#AF1828 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) | #4B4427 | 0.201 |
| Deuteranopia (no green cones) | #706422 | 0.182 |
| Tritanopia (no blue cones) | #C10020 | 0.036 |
| Achromatopsia (no color) | #595959 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AF1828
#AF1828
oklch(48.5% 0.183 23.2)
- #006C74
#006C74
oklch(48.4% 0.083 203.8)
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 #AF1828, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.016
- Rufous #AE2012 ΔE 0.022
- Brown #A52A2A ΔE 0.024
- Rouge #AB1239 ΔE 0.025
- Scarlet #BE0119 ΔE 0.031
- Rust Red #AA2704 ΔE 0.035
- Lipstick Red #C0022F ΔE 0.035
- Rusty Red #AF2F0D ΔE 0.040
Use #AF1828 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.