#CA4037
Closest named color: Dull Red (#BB3F3F). oklch(56.9% 0.176 27.8), rgb(202, 64, 55).
Aa
White text reads best on this color (4.88:1).
About this color
#CA4037 is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.176 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.032 away. White text reads best on it, at 4.88:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.29:1 |
| White text | 4.88:1 |
Values
| HEX | #CA4037 |
| RGB | rgb(202, 64, 55) |
| HSL | hsl(4, 58%, 50%) |
| OKLCH | oklch(56.9% 0.176 27.8) |
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 #CA4037 | 4.88:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #CA4037 | 4.29:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #CA4037 text on white | 4.88:1 | AA | Lc 72.7 | Content text, not long reading |
| #CA4037 text on black | 4.29:1 | AA large text | Lc -28.9 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F5CFC9
oklch(88.5% 0.044 28.5)
-
Step 300
300
#F0AEA4
oklch(81% 0.079 28.6)
-
Step 400
400
#E58074
oklch(70.8% 0.127 27.8)
-
Step 500
500
#DA5B4F
oklch(63.1% 0.162 28)
-
Step 600
600 (this color)
#CA4037
oklch(56.9% 0.176 27.8)
-
Step 700
700
#AA2C26
oklch(49.1% 0.164 27.7)
-
Step 800
800
#8A2721
oklch(42.7% 0.135 27.8)
-
Step 900
900
#6F2620
oklch(37.7% 0.105 27.8)
-
Step 950
950
#411713
oklch(26.9% 0.066 27.8)
#CA4037 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) | #675E35 | 0.187 |
| Deuteranopia (no green cones) | #8A7C32 | 0.171 |
| Tritanopia (no blue cones) | #DE143F | 0.056 |
| Achromatopsia (no color) | #717171 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CA4037
#CA4037
oklch(56.9% 0.176 27.8)
- #008795
#008795
oklch(57% 0.098 207.6)
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 #CA4037, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.032
- Faded Red #D3494E ΔE 0.033
- Dark Coral #CF524E ΔE 0.038
- Dusty Red #B9484E ΔE 0.039
- Brick Orange #C14A09 ΔE 0.044
- Sinopia #BB3E03 ΔE 0.047
- Burnt Orange #C04E01 ΔE 0.052
- Pale Red #D9544D ΔE 0.052
Use #CA4037 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.