#63403C
Closest named color: Purple Brown (#673A3F). oklch(41.1% 0.05 26.6), rgb(99, 64, 60).
Aa
White text reads best on this color (9.01:1).
About this color
#63403C is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.050 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.020 away. White text reads best on it, at 9.01:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.050) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.32:1 |
| White text | 9.01:1 |
Values
| HEX | #63403C |
| RGB | rgb(99, 64, 60) |
| HSL | hsl(6, 25%, 31%) |
| OKLCH | oklch(41.1% 0.05 26.6) |
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 #63403C | 9.01:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #63403C | 2.32:1 | Fails | Lc 13.4 | Not readable |
| #63403C text on white | 9.01:1 | AAA | Lc 90.6 | Preferred for body text |
| #63403C text on black | 2.32:1 | Fails | Lc -11.7 | 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
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#EFE8E7
oklch(93.6% 0.008 27.2)
-
Step 200
200
#E4D5D3
oklch(88.5% 0.017 26.7)
-
Step 300
300
#D3BAB7
oklch(80.9% 0.029 25.9)
-
Step 400
400
#BC9691
oklch(70.7% 0.046 27)
-
Step 500
500
#AB7C76
oklch(63.1% 0.06 27.1)
-
Step 600
600
#96655F
oklch(55.7% 0.065 27)
-
Step 700
700
#80534E
oklch(49.1% 0.061 26.5)
-
Step 800
800 (this color)
#63403C
oklch(41.1% 0.05 26.6)
-
Step 900
900
#553A37
oklch(37.8% 0.039 26.2)
-
Step 950
950
#322220
oklch(27.1% 0.025 26.9)
#63403C 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) | #47453C | 0.051 |
| Deuteranopia (no green cones) | #504C3C | 0.048 |
| Tritanopia (no blue cones) | #6A3C3F | 0.018 |
| Achromatopsia (no color) | #494949 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63403C
#63403C
oklch(41.1% 0.05 26.6)
- #265258
#265258
oklch(41% 0.049 207.1)
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 #63403C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.020
- Brownish Purple #76424E ΔE 0.047
- Mud Brown #60460F ΔE 0.063
- Charcoal Grey #3C4142 ΔE 0.069
- Chestnut #742802 ΔE 0.073
- Milk Chocolate #7F4E1E ΔE 0.083
- Red Brown #8B2E16 ΔE 0.086
- Dark Slate Gray #2F4F4F ΔE 0.088
Use #63403C 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.