#CF370B
Closest named color: Brick Orange (#C14A09). oklch(56.5% 0.195 34.6), rgb(207, 55, 11).
Aa
White text reads best on this color (4.99:1).
About this color
#CF370B is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.195 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Brick Orange (#C14A09), ΔE 0.037 away. White text reads best on it, at 4.99:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.195) |
| Temperature | warm |
| Nearest name | Brick Orange (#C14A09) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #CF370B |
| RGB | rgb(207, 55, 11) |
| HSL | hsl(13, 90%, 43%) |
| OKLCH | oklch(56.5% 0.195 34.6) |
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 #CF370B | 4.99:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #CF370B | 4.20:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #CF370B text on white | 4.99:1 | AA | Lc 73.1 | Content text, not long reading |
| #CF370B text on black | 4.20:1 | AA large text | Lc -28.6 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F7CEC4
oklch(88.4% 0.049 34)
-
Step 300
300
#F3AD9B
oklch(80.9% 0.087 35)
-
Step 400
400
#EA7D63
oklch(70.6% 0.14 34.5)
-
Step 500
500
#E05635
oklch(63% 0.179 34.7)
-
Step 600
600 (this color)
#CF370B
oklch(56.5% 0.195 34.6)
-
Step 700
700
#AD2900
oklch(49.1% 0.173 34.7)
-
Step 800
800
#8F2102
oklch(42.8% 0.15 34.6)
-
Step 900
900
#73220F
oklch(37.7% 0.118 34.3)
-
Step 950
950
#44160B
oklch(27.2% 0.074 34.7)
#CF370B 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) | #675A00 | 0.203 |
| Deuteranopia (no green cones) | #8C7C00 | 0.183 |
| Tritanopia (no blue cones) | #E50031 | 0.062 |
| Achromatopsia (no color) | #6F6F6F | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CF370B
#CF370B
oklch(56.5% 0.195 34.6)
- #00849A
#00849A
oklch(56.4% 0.1 214.8)
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 #CF370B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Orange #C14A09 ΔE 0.037
- Sinopia #BB3E03 ΔE 0.039
- Burnt Orange #C04E01 ΔE 0.045
- Deep Orange #DC4D01 ΔE 0.049
- Dull Red #BB3F3F ΔE 0.052
- Rust Orange #C45508 ΔE 0.053
- Tomato Red #EC2D01 ΔE 0.055
- Faded Red #D3494E ΔE 0.056
Use #CF370B 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.