#663D27
Closest named color: Purple Brown (#673A3F). oklch(40.4% 0.067 48.3), rgb(102, 61, 39).
Aa
White text reads best on this color (9.28:1).
About this color
#663D27 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.067 and its hue 48°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.040 away. White text reads best on it, at 9.28:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.067) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #663D27 |
| RGB | rgb(102, 61, 39) |
| HSL | hsl(21, 45%, 28%) |
| OKLCH | oklch(40.4% 0.067 48.3) |
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 #663D27 | 9.28:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #663D27 | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #663D27 text on white | 9.28:1 | AAA | Lc 91.2 | Preferred for body text |
| #663D27 text on black | 2.26:1 | Fails | Lc -11.1 | 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 800.
-
Step 50
50
#F9F4F2
oklch(97% 0.006 43.3)
-
Step 100
100
#F1E8E3
oklch(93.7% 0.012 51.3)
-
Step 200
200
#E6D5CD
oklch(88.5% 0.022 47)
-
Step 300
300
#D7BAAB
oklch(81% 0.039 49.1)
-
Step 400
400
#C2957F
oklch(70.7% 0.063 47.3)
-
Step 500
500
#B27B5E
oklch(63.2% 0.081 48.6)
-
Step 600
600
#9D6344
oklch(55.6% 0.088 48.4)
-
Step 700
700
#865236
oklch(49.1% 0.081 48.4)
-
Step 800
800 (this color)
#663D27
oklch(40.4% 0.067 48.3)
-
Step 900
900
#583928
oklch(37.6% 0.052 49.4)
-
Step 950
950
#342218
oklch(27.1% 0.033 49.9)
#663D27 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) | #484225 | 0.058 |
| Deuteranopia (no green cones) | #524B27 | 0.053 |
| Tritanopia (no blue cones) | #6F3538 | 0.042 |
| Achromatopsia (no color) | #474747 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D27
#663D27
oklch(40.4% 0.067 48.3)
- #184F65
#184F65
oklch(40.3% 0.067 228.7)
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 #663D27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.040
- Mud Brown #60460F ΔE 0.043
- Chestnut #742802 ΔE 0.053
- Brownish Purple #76424E ΔE 0.066
- Milk Chocolate #7F4E1E ΔE 0.073
- Rust Brown #8B3103 ΔE 0.075
- Red Brown #8B2E16 ΔE 0.075
- Green Brown #544E03 ΔE 0.075
Use #663D27 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.