#C66451
Closest named color: Terracotta (#CA6641). oklch(61.5% 0.129 32.3), rgb(198, 100, 81).
Aa
Black text reads best on this color (5.34:1).
About this color
#C66451 is a medium-dark, moderately saturated red. In OKLCH its lightness is 62%, its chroma 0.129 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Terracotta (#CA6641), ΔE 0.022 away. Black text reads best on it, at 5.34:1.
| Hue family | Reds |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.129) |
| Temperature | warm |
| Nearest name | Terracotta (#CA6641) |
| Black text | 5.34:1 |
| White text | 3.93:1 |
Values
| HEX | #C66451 |
| RGB | rgb(198, 100, 81) |
| HSL | hsl(10, 51%, 55%) |
| OKLCH | oklch(61.5% 0.129 32.3) |
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 #C66451 | 3.93:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #C66451 | 5.34:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #C66451 text on white | 3.93:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #C66451 text on black | 5.34:1 | AA | Lc -35.4 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F6E6E2
oklch(93.7% 0.018 34.3)
-
Step 200
200
#EFD1CB
oklch(88.4% 0.035 31.2)
-
Step 300
300
#E6B2A7
oklch(80.8% 0.063 32.1)
-
Step 400
400
#D88978
oklch(70.8% 0.101 32.8)
-
Step 500
500 (this color)
#C66451
oklch(61.5% 0.129 32.3)
-
Step 600
600
#B74E3B
oklch(55.7% 0.141 32.1)
-
Step 700
700
#9D3E2D
oklch(49.1% 0.131 32.2)
-
Step 800
800
#803426
oklch(42.8% 0.109 32.3)
-
Step 900
900
#672E23
oklch(37.7% 0.085 32.4)
-
Step 950
950
#3D1C15
oklch(27.2% 0.054 33.1)
#C66451 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) | #7C734F | 0.131 |
| Deuteranopia (no green cones) | #95884F | 0.119 |
| Tritanopia (no blue cones) | #D85360 | 0.054 |
| Achromatopsia (no color) | #808080 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C66451
#C66451
oklch(61.5% 0.129 32.3)
- #0095AA
#0095AA
oklch(61.5% 0.107 212.1)
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 #C66451, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terracotta #CA6641 ΔE 0.022
- Terracota #CB6843 ΔE 0.023
- Terra Cotta #C9643B ΔE 0.025
- Indian Red #CD5C5C ΔE 0.028
- Adobe #BD6C48 ΔE 0.029
- Clay #B66A50 ΔE 0.031
- Dark Coral #CF524E ΔE 0.038
- Pale Red #D9544D ΔE 0.043
Use #C66451 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.