#661B17
Closest named color: Reddy Brown (#6E1005). oklch(34.5% 0.108 27.4), rgb(102, 27, 23).
Aa
White text reads best on this color (12.11:1).
About this color
#661B17 is a dark, moderately saturated red. In OKLCH its lightness is 35%, its chroma 0.108 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.022 away. White text reads best on it, at 12.11:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.108) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.73:1 |
| White text | 12.11:1 |
Values
| HEX | #661B17 |
| RGB | rgb(102, 27, 23) |
| HSL | hsl(3, 63%, 25%) |
| OKLCH | oklch(34.5% 0.108 27.4) |
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 #661B17 | 12.11:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #661B17 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #661B17 text on white | 12.11:1 | AAA | Lc 96.7 | Preferred for body text |
| #661B17 text on black | 1.73:1 | 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
#F9E4E1
oklch(93.5% 0.023 27.3)
-
Step 200
200
#F6CFC9
oklch(88.6% 0.045 28.3)
-
Step 300
300
#F1ADA4
oklch(80.9% 0.082 27.5)
-
Step 400
400
#E67F73
oklch(70.7% 0.129 27.7)
-
Step 500
500
#DC594F
oklch(63.1% 0.166 27.2)
-
Step 600
600
#C73932
oklch(55.6% 0.18 27.5)
-
Step 700
700
#AB2925
oklch(49% 0.167 27.3)
-
Step 800
800
#8B2520
oklch(42.7% 0.138 27.5)
-
Step 900
900 (this color)
#661B17
oklch(34.5% 0.108 27.4)
-
Step 950
950
#421713
oklch(27.1% 0.068 27.8)
#661B17 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) | #302C16 | 0.116 |
| Deuteranopia (no green cones) | #433C14 | 0.106 |
| Tritanopia (no blue cones) | #71031B | 0.034 |
| Achromatopsia (no color) | #363636 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661B17
#661B17
oklch(34.5% 0.108 27.4)
- #004249
#004249
oklch(34.6% 0.059 206.7)
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 #661B17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.022
- Claret #680018 ΔE 0.034
- Blood #770001 ΔE 0.041
- Chestnut #742802 ΔE 0.050
- Burgundy #610023 ΔE 0.050
- Wine Red #7B0323 ΔE 0.052
- Maroon #800000 ΔE 0.056
- Bordeaux #7B002C ΔE 0.061
Use #661B17 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.