#663A2E
Closest named color: Purple Brown (#673A3F). oklch(39.9% 0.066 36.1), rgb(102, 58, 46).
Aa
White text reads best on this color (9.50:1).
About this color
#663A2E is a dark, muted red. In OKLCH its lightness is 40%, its chroma 0.066 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.027 away. White text reads best on it, at 9.50:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | muted (0.066) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.20:1 |
| White text | 9.50:1 |
Values
| HEX | #663A2E |
| RGB | rgb(102, 58, 46) |
| HSL | hsl(13, 38%, 29%) |
| OKLCH | oklch(39.9% 0.066 36.1) |
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 #663A2E | 9.50:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #663A2E | 2.20:1 | Fails | Lc 12.2 | Not readable |
| #663A2E text on white | 9.50:1 | AAA | Lc 91.8 | Preferred for body text |
| #663A2E text on black | 2.20:1 | Fails | Lc -10.6 | 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F3E7E3
oklch(93.6% 0.014 39.4)
-
Step 200
200
#EAD3CD
oklch(88.4% 0.027 35)
-
Step 300
300
#DEB6AB
oklch(80.9% 0.049 35.9)
-
Step 400
400
#CD8F7E
oklch(70.7% 0.08 36)
-
Step 500
500
#BE725E
oklch(63% 0.101 35.6)
-
Step 600
600
#A95A44
oklch(55.6% 0.109 36.5)
-
Step 700
700
#914936
oklch(49.1% 0.102 35.8)
-
Step 800
800
#763C2D
oklch(42.6% 0.085 35.5)
-
Step 900
900 (this color)
#663A2E
oklch(39.9% 0.066 36.1)
-
Step 950
950
#381F18
oklch(27% 0.041 36.4)
#663A2E 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) | #45402D | 0.063 |
| Deuteranopia (no green cones) | #4F492D | 0.059 |
| Tritanopia (no blue cones) | #6F3337 | 0.031 |
| Achromatopsia (no color) | #464646 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663A2E
#663A2E
oklch(39.9% 0.066 36.1)
- #0D505E
#0D505E
oklch(39.9% 0.066 216)
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 #663A2E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.027
- Chestnut #742802 ΔE 0.052
- Mud Brown #60460F ΔE 0.058
- Brownish Purple #76424E ΔE 0.059
- Red Brown #8B2E16 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.078
- Charcoal Grey #3C4142 ΔE 0.078
- Reddy Brown #6E1005 ΔE 0.081
Use #663A2E 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.