#C4373A
Closest named color: Dull Red (#BB3F3F). oklch(55% 0.178 24.2), rgb(196, 55, 58).
Aa
White text reads best on this color (5.31:1).
About this color
#C4373A is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.178 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.019 away. White text reads best on it, at 5.31:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.95:1 |
| White text | 5.31:1 |
Values
| HEX | #C4373A |
| RGB | rgb(196, 55, 58) |
| HSL | hsl(359, 56%, 49%) |
| OKLCH | oklch(55% 0.178 24.2) |
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 #C4373A | 5.31:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #C4373A | 3.95:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #C4373A text on white | 5.31:1 | AA | Lc 75.2 | Fine for body text |
| #C4373A text on black | 3.95:1 | AA large text | Lc -26.5 | 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 600.
-
Step 50
50
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E2
oklch(93.5% 0.023 24.1)
-
Step 200
200
#F5CECB
oklch(88.4% 0.044 23.2)
-
Step 300
300
#F0ADA7
oklch(80.9% 0.08 24.7)
-
Step 400
400
#E57E79
oklch(70.6% 0.128 23.7)
-
Step 500
500
#DB5956
oklch(63.1% 0.164 24.3)
-
Step 600
600 (this color)
#C4373A
oklch(55% 0.178 24.2)
-
Step 700
700
#AB2A2E
oklch(49.2% 0.165 24.3)
-
Step 800
800
#8B2527
oklch(42.8% 0.137 24.1)
-
Step 900
900
#702524
oklch(37.9% 0.107 24.4)
-
Step 950
950
#421715
oklch(27.1% 0.067 25.3)
#C4373A 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) | #5F5839 | 0.193 |
| Deuteranopia (no green cones) | #837635 | 0.176 |
| Tritanopia (no blue cones) | #D7003A | 0.049 |
| Achromatopsia (no color) | #6B6B6B | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C4373A
#C4373A
oklch(55% 0.178 24.2)
- #00818B
#00818B
oklch(55% 0.094 204.4)
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 #C4373A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.019
- Dusty Red #B9484E ΔE 0.034
- Cherry #CF0234 ΔE 0.042
- Sinopia #BB3E03 ΔE 0.048
- Faded Red #D3494E ΔE 0.048
- Lipstick Red #C0022F ΔE 0.049
- Dark Rose #B5485D ΔE 0.051
- Crimson #DC143C ΔE 0.051
Use #C4373A 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.