#63551B
Closest named color: Olive Brown (#645403). oklch(45.1% 0.078 95.4), rgb(99, 85, 27).
Aa
White text reads best on this color (7.37:1).
About this color
#63551B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 45%, its chroma 0.078 and its hue 95°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.013 away. White text reads best on it, at 7.37:1.
| Hue family | Browns |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #63551B |
| RGB | rgb(99, 85, 27) |
| HSL | hsl(48, 57%, 25%) |
| OKLCH | oklch(45.1% 0.078 95.4) |
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 #63551B | 7.37:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #63551B | 2.84:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #63551B text on white | 7.37:1 | AAA | Lc 85.6 | Fine for body text |
| #63551B text on black | 2.84:1 | Fails | Lc -16.5 | Dividers and decoration only |
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
#F7F5F1
oklch(97.1% 0.006 84.6)
-
Step 100
100
#ECEAE0
oklch(93.6% 0.013 97.4)
-
Step 200
200
#DED9C7
oklch(88.4% 0.025 94.1)
-
Step 300
300
#C9C1A0
oklch(80.9% 0.046 95.9)
-
Step 400
400
#AEA16C
oklch(70.7% 0.073 96)
-
Step 500
500
#9B8943
oklch(63.1% 0.093 95.2)
-
Step 600
600
#867220
oklch(55.6% 0.101 94.8)
-
Step 700
700
#716011
oklch(49.2% 0.095 95.9)
-
Step 800
800 (this color)
#63551B
oklch(45.1% 0.078 95.4)
-
Step 900
900
#4B4117
oklch(37.6% 0.061 95.9)
-
Step 950
950
#2C260F
oklch(26.9% 0.038 95)
#63551B 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) | #5E5313 | 0.013 |
| Deuteranopia (no green cones) | #62581E | 0.008 |
| Tritanopia (no blue cones) | #6B4E49 | 0.072 |
| Achromatopsia (no color) | #565656 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63551B
#63551B
oklch(45.1% 0.078 95.4)
- #495281
#495281
oklch(45.2% 0.078 274.6)
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 #63551B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.013
- Mud #735C12 ΔE 0.037
- Green Brown #544E03 ΔE 0.038
- Greeny Brown #696006 ΔE 0.039
- Mud Brown #60460F ΔE 0.044
- Army Green #4B5D16 ΔE 0.045
- Medium Brown #7F5112 ΔE 0.050
- Camo Green #526525 ΔE 0.051
Use #63551B 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.