#C31828
Closest named color: Lipstick Red (#C0022F). oklch(52.3% 0.2 24.4), rgb(195, 24, 40).
Aa
White text reads best on this color (6.03:1).
About this color
#C31828 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.200 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.019 away. White text reads best on it, at 6.03:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.200) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.48:1 |
| White text | 6.03:1 |
Values
| HEX | #C31828 |
| RGB | rgb(195, 24, 40) |
| HSL | hsl(354, 78%, 43%) |
| OKLCH | oklch(52.3% 0.2 24.4) |
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 #C31828 | 6.03:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #C31828 | 3.48:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #C31828 text on white | 6.03:1 | AA | Lc 78.1 | Fine for body text |
| #C31828 text on black | 3.48:1 | AA large text | Lc -23.7 | 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 700.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FBCCC8
oklch(88.5% 0.054 23.9)
-
Step 300
300
#F9A8A2
oklch(80.9% 0.097 24.1)
-
Step 400
400
#F2756F
oklch(70.7% 0.155 24.6)
-
Step 500
500
#E94849
oklch(63.1% 0.198 24.5)
-
Step 600
600
#D4172B
oklch(55.5% 0.215 24.3)
-
Step 700
700 (this color)
#C31828
oklch(52.3% 0.2 24.4)
-
Step 800
800
#950C1B
oklch(42.7% 0.166 24.3)
-
Step 900
900
#78191C
oklch(37.8% 0.129 24.5)
-
Step 950
950
#461111
oklch(26.9% 0.081 24.4)
#C31828 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) | #544C26 | 0.220 |
| Deuteranopia (no green cones) | #7D6F20 | 0.199 |
| Tritanopia (no blue cones) | #D70021 | 0.039 |
| Achromatopsia (no color) | #636363 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C31828
#C31828
oklch(52.3% 0.2 24.4)
- #007882
#007882
oklch(52.3% 0.089 205)
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 #C31828, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.019
- Scarlet #BE0119 ΔE 0.020
- Cherry #CF0234 ΔE 0.028
- Rose Red #BE013C ΔE 0.033
- Firebrick #B22222 ΔE 0.035
- Ruby #CA0147 ΔE 0.043
- Dull Red #BB3F3F ΔE 0.045
- Rufous #AE2012 ΔE 0.047
Use #C31828 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.