#661C1D
Closest named color: Reddy Brown (#6E1005). oklch(34.7% 0.106 23.8), rgb(102, 28, 29).
Aa
White text reads best on this color (12.00:1).
About this color
#661C1D is a dark, moderately saturated red. In OKLCH its lightness is 35%, its chroma 0.106 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.027 away. White text reads best on it, at 12.00:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.106) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.74:1 |
| White text | 12.00:1 |
Values
| HEX | #661C1D |
| RGB | rgb(102, 28, 29) |
| HSL | hsl(359, 57%, 25%) |
| OKLCH | oklch(34.7% 0.106 23.8) |
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 #661C1D | 12.00:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #661C1D | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #661C1D text on white | 12.00:1 | AAA | Lc 96.6 | Preferred for body text |
| #661C1D text on black | 1.74:1 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E2
oklch(93.5% 0.023 24.1)
-
Step 200
200
#F5CECB
oklch(88.4% 0.044 23.2)
-
Step 300
300
#F0ADA8
oklch(80.9% 0.08 23.8)
-
Step 400
400
#E57F7A
oklch(70.8% 0.127 23.7)
-
Step 500
500
#DA5A57
oklch(63.1% 0.162 24.2)
-
Step 600
600
#C63A3D
oklch(55.7% 0.177 23.9)
-
Step 700
700
#AA2A2F
oklch(49% 0.164 23.8)
-
Step 800
800
#8A2528
oklch(42.6% 0.136 23.6)
-
Step 900
900 (this color)
#661C1D
oklch(34.7% 0.106 23.8)
-
Step 950
950
#421716
oklch(27.1% 0.067 23.9)
#661C1D 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) | #302C1C | 0.115 |
| Deuteranopia (no green cones) | #433C1B | 0.104 |
| Tritanopia (no blue cones) | #71071D | 0.031 |
| Achromatopsia (no color) | #363636 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661C1D
#661C1D
oklch(34.7% 0.106 23.8)
- #004348
#004348
oklch(34.9% 0.059 203.2)
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 #661C1D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.027
- Claret #680018 ΔE 0.034
- Blood #770001 ΔE 0.043
- Burgundy #610023 ΔE 0.048
- Wine Red #7B0323 ΔE 0.050
- Chestnut #742802 ΔE 0.053
- Bordeaux #7B002C ΔE 0.057
- Maroon #800000 ΔE 0.058
Use #661C1D 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.