#663E27
Closest named color: Mud Brown (#60460F). oklch(40.6% 0.066 50), rgb(102, 62, 39).
Aa
White text reads best on this color (9.19:1).
About this color
#663E27 is a dark, muted brown. In OKLCH its lightness is 41%, its chroma 0.066 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.041 away. White text reads best on it, at 9.19:1.
| Hue family | Browns |
| Lightness | dark (41%) |
| Chroma | muted (0.066) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #663E27 |
| RGB | rgb(102, 62, 39) |
| HSL | hsl(22, 45%, 28%) |
| OKLCH | oklch(40.6% 0.066 50) |
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 #663E27 | 9.19:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #663E27 | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #663E27 text on white | 9.19:1 | AAA | Lc 91.0 | Preferred for body text |
| #663E27 text on black | 2.28:1 | Fails | Lc -11.3 | 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
#F8F4F2
oklch(97% 0.005 48.7)
-
Step 100
100
#F0E8E3
oklch(93.6% 0.011 54.5)
-
Step 200
200
#E6D5CD
oklch(88.5% 0.022 47)
-
Step 300
300
#D6BAAB
oklch(80.9% 0.038 50)
-
Step 400
400
#C1967E
oklch(70.7% 0.062 50.5)
-
Step 500
500
#B17B5E
oklch(63.1% 0.079 49.1)
-
Step 600
600
#9C6444
oklch(55.7% 0.086 50)
-
Step 700
700
#855235
oklch(49% 0.081 49.7)
-
Step 800
800 (this color)
#663E27
oklch(40.6% 0.066 50)
-
Step 900
900
#583928
oklch(37.6% 0.052 49.4)
-
Step 950
950
#342218
oklch(27.1% 0.033 49.9)
#663E27 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) | #494225 | 0.055 |
| Deuteranopia (no green cones) | #534B27 | 0.050 |
| Tritanopia (no blue cones) | #6F3638 | 0.042 |
| Achromatopsia (no color) | #484848 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663E27
#663E27
oklch(40.6% 0.066 50)
- #1B5066
#1B5066
oklch(40.7% 0.066 229.2)
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 #663E27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.041
- Purple Brown #673A3F ΔE 0.041
- Chestnut #742802 ΔE 0.054
- Brownish Purple #76424E ΔE 0.066
- Milk Chocolate #7F4E1E ΔE 0.071
- Green Brown #544E03 ΔE 0.073
- Rust Brown #8B3103 ΔE 0.075
- Red Brown #8B2E16 ΔE 0.076
Use #663E27 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.