#581604
Closest named color: Reddy Brown (#6E1005). oklch(31% 0.1 35.7), rgb(88, 22, 4).
Aa
White text reads best on this color (13.71:1).
About this color
#581604 is a dark, moderately saturated red. In OKLCH its lightness is 31%, its chroma 0.100 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.049 away. White text reads best on it, at 13.71:1.
| Hue family | Reds |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.100) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.53:1 |
| White text | 13.71:1 |
Values
| HEX | #581604 |
| RGB | rgb(88, 22, 4) |
| HSL | hsl(13, 91%, 18%) |
| OKLCH | oklch(31% 0.1 35.7) |
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 #581604 | 13.71:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #581604 | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #581604 text on white | 13.71:1 | AAA | Lc 99.4 | Preferred for body text |
| #581604 text on black | 1.53:1 | 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
#FFE3DB
oklch(93.7% 0.033 36.5)
-
Step 200
200
#FFCBBD
oklch(88.4% 0.063 35.5)
-
Step 300
300
#FFA78F
oklch(81% 0.11 36)
-
Step 400
400
#FF6C45
oklch(70.7% 0.188 35.8)
-
Step 500
500
#F04200
oklch(63.2% 0.218 35.7)
-
Step 600
600
#CA3600
oklch(55.5% 0.191 35.7)
-
Step 700
700
#AB2C00
oklch(49% 0.169 35.7)
-
Step 800
800
#8E2300
oklch(42.8% 0.148 35.7)
-
Step 900
900
#771C00
oklch(37.7% 0.13 35.8)
-
Step 950
950 (this color)
#581604
oklch(31% 0.1 35.7)
#581604 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) | #2A2402 | 0.103 |
| Deuteranopia (no green cones) | #3A3301 | 0.095 |
| Tritanopia (no blue cones) | #620013 | 0.039 |
| Achromatopsia (no color) | #2D2D2D | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #581604
#581604
oklch(31% 0.1 35.7)
- #003742
#003742
oklch(31% 0.055 215.9)
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 #581604, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.049
- Claret #680018 ΔE 0.049
- Mahogany #4A0100 ΔE 0.053
- Chocolate Brown #411900 ΔE 0.053
- Burgundy #610023 ΔE 0.057
- Blood #770001 ΔE 0.068
- Deep Brown #410200 ΔE 0.072
- Chestnut #742802 ΔE 0.079
Use #581604 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.