#661F01
Closest named color: Reddy Brown (#6E1005). oklch(34.8% 0.109 39.8), rgb(102, 31, 1).
Aa
White text reads best on this color (11.92:1).
About this color
#661F01 is a dark, moderately saturated red. In OKLCH its lightness is 35%, its chroma 0.109 and its hue 40°. 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 11.92:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.109) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.76:1 |
| White text | 11.92:1 |
Values
| HEX | #661F01 |
| RGB | rgb(102, 31, 1) |
| HSL | hsl(18, 98%, 20%) |
| OKLCH | oklch(34.8% 0.109 39.8) |
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 #661F01 | 11.92:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #661F01 | 1.76:1 | Fails | Lc 7.5 | Not readable |
| #661F01 text on white | 11.92:1 | AAA | Lc 96.4 | Preferred for body text |
| #661F01 text on black | 1.76:1 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F9E5DE
oklch(93.6% 0.024 40.3)
-
Step 200
200
#F5D0C3
oklch(88.6% 0.045 40.3)
-
Step 300
300
#EFAF99
oklch(80.8% 0.082 39.8)
-
Step 400
400
#E48260
oklch(70.6% 0.13 39.8)
-
Step 500
500
#DA5E30
oklch(63.1% 0.167 39.7)
-
Step 600
600
#C34200
oklch(55.6% 0.175 39.8)
-
Step 700
700
#A53600
oklch(49% 0.155 39.6)
-
Step 800
800
#882B00
oklch(42.6% 0.135 39.6)
-
Step 900
900 (this color)
#661F01
oklch(34.8% 0.109 39.8)
-
Step 950
950
#411809
oklch(26.9% 0.069 39.8)
#661F01 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) | #342D00 | 0.108 |
| Deuteranopia (no green cones) | #463D00 | 0.097 |
| Tritanopia (no blue cones) | #71081A | 0.048 |
| Achromatopsia (no color) | #373737 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661F01
#661F01
oklch(34.8% 0.109 39.8)
- #004151
#004151
oklch(34.7% 0.064 220.9)
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 #661F01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.027
- Chestnut #742802 ΔE 0.039
- Blood #770001 ΔE 0.046
- Claret #680018 ΔE 0.053
- Maroon #800000 ΔE 0.059
- Wine Red #7B0323 ΔE 0.067
- Burgundy #610023 ΔE 0.071
- Bordeaux #7B002C ΔE 0.078
Use #661F01 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.