#66001D
Closest named color: Claret (#680018). oklch(32.4% 0.13 15.3), rgb(102, 0, 29).
Aa
White text reads best on this color (13.26:1).
About this color
#66001D is a dark, moderately saturated red. In OKLCH its lightness is 32%, its chroma 0.130 and its hue 15°. Its hue sits on the warm side of the wheel. The nearest named color is Claret (#680018), ΔE 0.009 away. White text reads best on it, at 13.26:1.
| Hue family | Reds |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.130) |
| Temperature | warm |
| Nearest name | Claret (#680018) |
| Black text | 1.58:1 |
| White text | 13.26:1 |
Values
| HEX | #66001D |
| RGB | rgb(102, 0, 29) |
| HSL | hsl(343, 100%, 20%) |
| OKLCH | oklch(32.4% 0.13 15.3) |
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 #66001D | 13.26:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #66001D | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #66001D text on white | 13.26:1 | AAA | Lc 97.7 | Preferred for body text |
| #66001D text on black | 1.58:1 | Fails | Lc 0.0 | Not readable |
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 900.
-
Step 50
50
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FCE3E4
oklch(93.6% 0.028 14.9)
-
Step 200
200
#FBCBCD
oklch(88.4% 0.055 15.4)
-
Step 300
300
#F9A7AC
oklch(81% 0.097 15.4)
-
Step 400
400
#F17380
oklch(70.7% 0.155 15.5)
-
Step 500
500
#E84561
oklch(63.1% 0.199 15.2)
-
Step 600
600
#D31148
oklch(55.5% 0.216 15.2)
-
Step 700
700
#B5003A
oklch(49.1% 0.196 15.4)
-
Step 800
800
#940730
oklch(42.7% 0.166 15)
-
Step 900
900 (this color)
#66001D
oklch(32.4% 0.13 15.3)
-
Step 950
950
#461019
oklch(27% 0.082 15)
#66001D 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) | #24231D | 0.146 |
| Deuteranopia (no green cones) | #3D371A | 0.132 |
| Tritanopia (no blue cones) | #71000E | 0.032 |
| Achromatopsia (no color) | #303030 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66001D
#66001D
oklch(32.4% 0.13 15.3)
- #003C3D
#003C3D
oklch(32.3% 0.055 196.6)
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 #66001D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Claret #680018 ΔE 0.009
- Burgundy #610023 ΔE 0.016
- Reddy Brown #6E1005 ΔE 0.043
- Blood #770001 ΔE 0.050
- Wine Red #7B0323 ΔE 0.050
- Merlot #730039 ΔE 0.052
- Bordeaux #7B002C ΔE 0.052
- Maroon #800000 ΔE 0.067
Use #66001D 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.