#C64737
Closest named color: Dull Red (#BB3F3F). oklch(57.1% 0.165 30.1), rgb(198, 71, 55).
Aa
White text reads best on this color (4.81:1).
About this color
#C64737 is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.165 and its hue 30°. 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 4.81:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.35:1 |
| White text | 4.81:1 |
Values
| HEX | #C64737 |
| RGB | rgb(198, 71, 55) |
| HSL | hsl(7, 57%, 50%) |
| OKLCH | oklch(57.1% 0.165 30.1) |
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 #C64737 | 4.81:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #C64737 | 4.35:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #C64737 text on white | 4.81:1 | AA | Lc 72.5 | Content text, not long reading |
| #C64737 text on black | 4.35:1 | AA large text | Lc -29.2 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F3D0C9
oklch(88.5% 0.041 31.2)
-
Step 300
300
#EDAFA4
oklch(80.9% 0.075 30.1)
-
Step 400
400
#E18374
oklch(70.8% 0.119 30)
-
Step 500
500
#D6604F
oklch(63.2% 0.152 30.2)
-
Step 600
600 (this color)
#C64737
oklch(57.1% 0.165 30.1)
-
Step 700
700
#A63325
oklch(49.1% 0.153 30.3)
-
Step 800
800
#872B20
oklch(42.7% 0.128 30)
-
Step 900
900
#6D291F
oklch(37.8% 0.099 30.7)
-
Step 950
950
#401913
oklch(27.1% 0.062 30.5)
#C64737 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) | #6A6034 | 0.173 |
| Deuteranopia (no green cones) | #8A7C33 | 0.158 |
| Tritanopia (no blue cones) | #D92744 | 0.057 |
| Achromatopsia (no color) | #727272 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C64737
#C64737
oklch(57.1% 0.165 30.1)
- #008798
#008798
oklch(57.1% 0.099 210.2)
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 #C64737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.032
- Dark Coral #CF524E ΔE 0.035
- Brick Orange #C14A09 ΔE 0.035
- Dusty Red #B9484E ΔE 0.037
- Faded Red #D3494E ΔE 0.037
- Burnt Orange #C04E01 ΔE 0.042
- Sinopia #BB3E03 ΔE 0.042
- Rust Orange #C45508 ΔE 0.048
Use #C64737 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.