#591803
Closest named color: Reddy Brown (#6E1005). oklch(31.4% 0.1 37.3), rgb(89, 24, 3).
Aa
White text reads best on this color (13.48:1).
About this color
#591803 is a dark, moderately saturated red. In OKLCH its lightness is 31%, its chroma 0.100 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.047 away. White text reads best on it, at 13.48:1.
| Hue family | Reds |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.100) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.55:1 |
| White text | 13.48:1 |
Values
| HEX | #591803 |
| RGB | rgb(89, 24, 3) |
| HSL | hsl(15, 93%, 18%) |
| OKLCH | oklch(31.4% 0.1 37.3) |
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 #591803 | 13.48:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #591803 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #591803 text on white | 13.48:1 | AAA | Lc 99.2 | Preferred for body text |
| #591803 text on black | 1.55:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FFE3DA
oklch(93.6% 0.033 38.6)
-
Step 200
200
#FFCCBC
oklch(88.6% 0.062 38.1)
-
Step 300
300
#FFA78D
oklch(80.9% 0.111 37.2)
-
Step 400
400
#FF6C3F
oklch(70.7% 0.189 37.3)
-
Step 500
500
#EC4800
oklch(63.1% 0.21 37.3)
-
Step 600
600
#C73B00
oklch(55.5% 0.185 37.2)
-
Step 700
700
#A93100
oklch(49.2% 0.163 37.3)
-
Step 800
800
#8B2700
oklch(42.7% 0.141 37.5)
-
Step 900
900
#751F00
oklch(37.6% 0.125 37.3)
-
Step 950
950 (this color)
#591803
oklch(31.4% 0.1 37.3)
#591803 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) | #2B2500 | 0.103 |
| Deuteranopia (no green cones) | #3B3400 | 0.093 |
| Tritanopia (no blue cones) | #630314 | 0.041 |
| Achromatopsia (no color) | #2E2E2E | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #591803
#591803
oklch(31.4% 0.1 37.3)
- #003844
#003844
oklch(31.4% 0.056 217.3)
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 #591803, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.047
- Claret #680018 ΔE 0.050
- Chocolate Brown #411900 ΔE 0.055
- Mahogany #4A0100 ΔE 0.058
- Burgundy #610023 ΔE 0.060
- Blood #770001 ΔE 0.066
- Chestnut #742802 ΔE 0.074
- Deep Brown #410200 ΔE 0.077
Use #591803 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.