#661B0F
Closest named color: Reddy Brown (#6E1005). oklch(34.4% 0.109 31.8), rgb(102, 27, 15).
Aa
White text reads best on this color (12.14:1).
About this color
#661B0F is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.109 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.020 away. White text reads best on it, at 12.14:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.109) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.72:1 |
| White text | 12.14:1 |
Values
| HEX | #661B0F |
| RGB | rgb(102, 27, 15) |
| HSL | hsl(8, 74%, 23%) |
| OKLCH | oklch(34.4% 0.109 31.8) |
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 #661B0F | 12.14:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #661B0F | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #661B0F text on white | 12.14:1 | AAA | Lc 96.8 | Preferred for body text |
| #661B0F text on black | 1.72:1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F6CFC7
oklch(88.6% 0.046 31.6)
-
Step 300
300
#F1ADA0
oklch(80.8% 0.083 31.1)
-
Step 400
400
#E67F6C
oklch(70.6% 0.131 31.6)
-
Step 500
500
#DC5A44
oklch(63.1% 0.168 31.7)
-
Step 600
600
#C83923
oklch(55.6% 0.183 31.6)
-
Step 700
700
#AC2A15
oklch(49.1% 0.17 31.9)
-
Step 800
800
#8C2515
oklch(42.7% 0.141 31.7)
-
Step 900
900 (this color)
#661B0F
oklch(34.4% 0.109 31.8)
-
Step 950
950
#42170F
oklch(27% 0.069 32.4)
#661B0F 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) | #312B0D | 0.115 |
| Deuteranopia (no green cones) | #443C0C | 0.105 |
| Tritanopia (no blue cones) | #710219 | 0.038 |
| Achromatopsia (no color) | #363636 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661B0F
#661B0F
oklch(34.4% 0.109 31.8)
- #00414B
#00414B
oklch(34.4% 0.06 211.8)
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 #661B0F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.020
- Claret #680018 ΔE 0.039
- Blood #770001 ΔE 0.040
- Chestnut #742802 ΔE 0.047
- Maroon #800000 ΔE 0.056
- Burgundy #610023 ΔE 0.056
- Wine Red #7B0323 ΔE 0.057
- Bordeaux #7B002C ΔE 0.066
Use #661B0F 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.