#903703
Closest named color: Rust Brown (#8B3103). oklch(45.6% 0.132 43.4), rgb(144, 55, 3).
Aa
White text reads best on this color (7.68:1).
About this color
#903703 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 46%, its chroma 0.132 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Brown (#8B3103), ΔE 0.018 away. White text reads best on it, at 7.68:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.132) |
| Temperature | warm |
| Nearest name | Rust Brown (#8B3103) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #903703 |
| RGB | rgb(144, 55, 3) |
| HSL | hsl(22, 96%, 29%) |
| OKLCH | oklch(45.6% 0.132 43.4) |
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 #903703 | 7.68:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #903703 | 2.73:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #903703 text on white | 7.68:1 | AAA | Lc 85.9 | Fine for body text |
| #903703 text on black | 2.73:1 | Fails | Lc -16.2 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E6DE
oklch(93.7% 0.023 45.6)
-
Step 200
200
#F3D1C3
oklch(88.6% 0.043 43.7)
-
Step 300
300
#ECB199
oklch(80.9% 0.077 43.1)
-
Step 400
400
#E0865F
oklch(70.8% 0.123 43.8)
-
Step 500
500
#D5632E
oklch(63.1% 0.158 43.2)
-
Step 600
600
#BD4900
oklch(55.5% 0.164 43.3)
-
Step 700
700
#A03D00
oklch(49.1% 0.144 43.5)
-
Step 800
800 (this color)
#903703
oklch(45.6% 0.132 43.4)
-
Step 900
900
#6C2B09
oklch(37.7% 0.102 43.7)
-
Step 950
950
#401A08
oklch(27.1% 0.066 43.9)
#903703 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) | #514600 | 0.126 |
| Deuteranopia (no green cones) | #675B00 | 0.114 |
| Tritanopia (no blue cones) | #9F1F2F | 0.066 |
| Achromatopsia (no color) | #535353 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #903703
#903703
oklch(45.6% 0.132 43.4)
- #00617A
#00617A
oklch(45.7% 0.085 223.4)
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 #903703, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Brown #8B3103 ΔE 0.018
- Brown Red #922B05 ΔE 0.023
- Red Brown #8B2E16 ΔE 0.027
- Saddle Brown #8B4513 ΔE 0.030
- Russet #A13905 ΔE 0.036
- Brick #A03623 ΔE 0.040
- Burnt Red #9F2305 ΔE 0.041
- Burnt Umber #A0450E ΔE 0.048
Use #903703 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.