#663123
Closest named color: Chestnut (#742802). oklch(38% 0.08 35.8), rgb(102, 49, 35).
Aa
White text reads best on this color (10.35:1).
About this color
#663123 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.080 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.037 away. White text reads best on it, at 10.35:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.080) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.02:1 |
| White text | 10.35:1 |
Values
| HEX | #663123 |
| RGB | rgb(102, 49, 35) |
| HSL | hsl(13, 49%, 27%) |
| OKLCH | oklch(38% 0.08 35.8) |
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 #663123 | 10.35:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #663123 | 2.02:1 | Fails | Lc 10.3 | Not readable |
| #663123 text on white | 10.35:1 | AAA | Lc 93.7 | Preferred for body text |
| #663123 text on black | 2.02:1 | Fails | Lc -8.9 | 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
#FBF4F2
oklch(97.2% 0.008 36.6)
-
Step 100
100
#F5E6E2
oklch(93.6% 0.017 35.3)
-
Step 200
200
#EED2CA
oklch(88.5% 0.033 36.5)
-
Step 300
300
#E4B4A6
oklch(80.9% 0.06 36.9)
-
Step 400
400
#D58B77
oklch(70.7% 0.096 35.8)
-
Step 500
500
#C86C53
oklch(63.1% 0.123 36.1)
-
Step 600
600
#B35238
oklch(55.6% 0.133 36)
-
Step 700
700
#9A422A
oklch(49.2% 0.124 36.2)
-
Step 800
800
#7D3724
oklch(42.7% 0.102 36.1)
-
Step 900
900 (this color)
#663123
oklch(38% 0.08 35.8)
-
Step 950
950
#3B1D14
oklch(27% 0.05 37.5)
#663123 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) | #3F3922 | 0.078 |
| Deuteranopia (no green cones) | #4C4522 | 0.073 |
| Tritanopia (no blue cones) | #70272E | 0.037 |
| Achromatopsia (no color) | #404040 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663123
#663123
oklch(38% 0.08 35.8)
- #004B59
#004B59
oklch(38% 0.067 215.6)
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 #663123, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.037
- Purple Brown #673A3F ΔE 0.041
- Reddy Brown #6E1005 ΔE 0.059
- Mud Brown #60460F ΔE 0.069
- Blood #770001 ΔE 0.071
- Maroon #800000 ΔE 0.076
- Wine Red #7B0323 ΔE 0.076
- Red Brown #8B2E16 ΔE 0.076
Use #663123 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.