#603733
Closest named color: Purple Brown (#673A3F). oklch(38.6% 0.06 26.1), rgb(96, 55, 51).
Aa
White text reads best on this color (10.03:1).
About this color
#603733 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.060 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.024 away. White text reads best on it, at 10.03:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.060) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.09:1 |
| White text | 10.03:1 |
Values
| HEX | #603733 |
| RGB | rgb(96, 55, 51) |
| HSL | hsl(5, 31%, 29%) |
| OKLCH | oklch(38.6% 0.06 26.1) |
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 #603733 | 10.03:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #603733 | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #603733 text on white | 10.03:1 | AAA | Lc 93.1 | Preferred for body text |
| #603733 text on black | 2.09:1 | Fails | Lc -9.4 | 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
#F9F4F3
oklch(97.1% 0.006 31.1)
-
Step 100
100
#F2E7E5
oklch(93.6% 0.012 29.9)
-
Step 200
200
#E9D3D1
oklch(88.4% 0.025 23.9)
-
Step 300
300
#DCB6B2
oklch(80.9% 0.044 25.1)
-
Step 400
400
#C99089
oklch(70.7% 0.071 26.8)
-
Step 500
500
#BA736C
oklch(63% 0.091 26)
-
Step 600
600
#A65B54
oklch(55.7% 0.1 26.3)
-
Step 700
700
#8E4A44
oklch(49.1% 0.093 26.3)
-
Step 800
800
#733D38
oklch(42.6% 0.077 26.3)
-
Step 900
900 (this color)
#603733
oklch(38.6% 0.06 26.1)
-
Step 950
950
#371F1D
oklch(27% 0.038 25)
#603733 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) | #403D33 | 0.061 |
| Deuteranopia (no green cones) | #4A4532 | 0.057 |
| Tritanopia (no blue cones) | #683136 | 0.023 |
| Achromatopsia (no color) | #424242 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603733
#603733
oklch(38.6% 0.06 26.1)
- #104D54
#104D54
oklch(38.7% 0.06 206.5)
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 #603733, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.024
- Chestnut #742802 ΔE 0.060
- Brownish Purple #76424E ΔE 0.065
- Charcoal Grey #3C4142 ΔE 0.068
- Mud Brown #60460F ΔE 0.070
- Reddy Brown #6E1005 ΔE 0.079
- Onyx #343A40 ΔE 0.081
- Red Brown #8B2E16 ΔE 0.089
Use #603733 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.