#AF2437
Closest named color: Firebrick (#B22222). oklch(49.6% 0.174 19.6), rgb(175, 36, 55).
Aa
White text reads best on this color (6.70:1).
About this color
#AF2437 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.174 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.023 away. White text reads best on it, at 6.70:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.13:1 |
| White text | 6.70:1 |
Values
| HEX | #AF2437 |
| RGB | rgb(175, 36, 55) |
| HSL | hsl(352, 66%, 41%) |
| OKLCH | oklch(49.6% 0.174 19.6) |
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 #AF2437 | 6.70:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #AF2437 | 3.13:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #AF2437 text on white | 6.70:1 | AA | Lc 81.6 | Fine for body text |
| #AF2437 text on black | 3.13:1 | AA large text | Lc -20.3 | 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
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F7CECD
oklch(88.6% 0.046 19.7)
-
Step 300
300
#F2ABAB
oklch(80.9% 0.084 19.1)
-
Step 400
400
#E87B7E
oklch(70.6% 0.135 19.4)
-
Step 500
500
#DE545E
oklch(63.1% 0.172 19.3)
-
Step 600
600
#C93244
oklch(55.6% 0.186 19.6)
-
Step 700
700 (this color)
#AF2437
oklch(49.6% 0.174 19.6)
-
Step 800
800
#8D202D
oklch(42.8% 0.144 19.6)
-
Step 900
900
#712128
oklch(37.6% 0.112 19.5)
-
Step 950
950
#431518
oklch(27.1% 0.071 19.4)
#AF2437 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) | #4E4937 | 0.191 |
| Deuteranopia (no green cones) | #716633 | 0.174 |
| Tritanopia (no blue cones) | #C0002D | 0.035 |
| Achromatopsia (no color) | #5C5C5C | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AF2437
#AF2437
oklch(49.6% 0.174 19.6)
- #007074
#007074
oklch(49.5% 0.084 199.1)
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 #AF2437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.023
- Rouge #AB1239 ΔE 0.023
- Brown #A52A2A ΔE 0.027
- Rufous #AE2012 ΔE 0.034
- Rose Red #BE013C ΔE 0.035
- Lipstick Red #C0022F ΔE 0.035
- Scarlet #BE0119 ΔE 0.039
- Raspberry #B00149 ΔE 0.042
Use #AF2437 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.