#66231A
Closest named color: Reddy Brown (#6E1005). oklch(35.6% 0.099 30.3), rgb(102, 35, 26).
Aa
White text reads best on this color (11.53:1).
About this color
#66231A is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.099 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.031 away. White text reads best on it, at 11.53:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.099) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.82:1 |
| White text | 11.53:1 |
Values
| HEX | #66231A |
| RGB | rgb(102, 35, 26) |
| HSL | hsl(7, 59%, 25%) |
| OKLCH | oklch(35.6% 0.099 30.3) |
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 #66231A | 11.53:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #66231A | 1.82:1 | Fails | Lc 8.0 | Not readable |
| #66231A text on white | 11.53:1 | AAA | Lc 95.9 | Preferred for body text |
| #66231A text on black | 1.82:1 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F3D0C9
oklch(88.5% 0.041 31.2)
-
Step 300
300
#EDAFA4
oklch(80.9% 0.075 30.1)
-
Step 400
400
#E18374
oklch(70.8% 0.119 30)
-
Step 500
500
#D5604F
oklch(63% 0.151 30.2)
-
Step 600
600
#C14333
oklch(55.7% 0.164 30.2)
-
Step 700
700
#A63325
oklch(49.1% 0.153 30.3)
-
Step 800
800
#872C20
oklch(42.8% 0.127 30.5)
-
Step 900
900 (this color)
#66231A
oklch(35.6% 0.099 30.3)
-
Step 950
950
#401913
oklch(27.1% 0.062 30.5)
#66231A 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) | #353019 | 0.103 |
| Deuteranopia (no green cones) | #463F18 | 0.095 |
| Tritanopia (no blue cones) | #711321 | 0.036 |
| Achromatopsia (no color) | #393939 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66231A
#66231A
oklch(35.6% 0.099 30.3)
- #00454E
#00454E
oklch(35.8% 0.062 209.5)
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 #66231A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.031
- Chestnut #742802 ΔE 0.040
- Blood #770001 ΔE 0.048
- Claret #680018 ΔE 0.049
- Wine Red #7B0323 ΔE 0.058
- Maroon #800000 ΔE 0.060
- Burgundy #610023 ΔE 0.064
- Purple Brown #673A3F ΔE 0.065
Use #66231A 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.