#66150F
Closest named color: Reddy Brown (#6E1005). oklch(33.7% 0.115 29), rgb(102, 21, 15).
Aa
White text reads best on this color (12.50:1).
About this color
#66150F is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.115 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.018 away. White text reads best on it, at 12.50:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.115) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.67:1 |
| White text | 12.50:1 |
Values
| HEX | #66150F |
| RGB | rgb(102, 21, 15) |
| HSL | hsl(4, 74%, 23%) |
| OKLCH | oklch(33.7% 0.115 29) |
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 #66150F | 12.50:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #66150F | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #66150F text on white | 12.50:1 | AAA | Lc 97.2 | Preferred for body text |
| #66150F text on black | 1.67:1 | 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 900.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F7CEC7
oklch(88.5% 0.048 29.4)
-
Step 300
300
#F3ACA1
oklch(80.9% 0.086 28.9)
-
Step 400
400
#EA7C6D
oklch(70.7% 0.139 29.1)
-
Step 500
500
#E05546
oklch(63.1% 0.176 29.1)
-
Step 600
600
#CB3227
oklch(55.5% 0.191 29)
-
Step 700
700
#AF2219
oklch(49% 0.178 29.1)
-
Step 800
800
#8E2018
oklch(42.7% 0.147 29)
-
Step 900
900 (this color)
#66150F
oklch(33.7% 0.115 29)
-
Step 950
950
#431510
oklch(26.9% 0.073 29)
#66150F 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) | #2E280D | 0.123 |
| Deuteranopia (no green cones) | #423A0B | 0.112 |
| Tritanopia (no blue cones) | #710015 | 0.031 |
| Achromatopsia (no color) | #343434 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66150F
#66150F
oklch(33.7% 0.115 29)
- #003F47
#003F47
oklch(33.7% 0.058 208.9)
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 #66150F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.018
- Claret #680018 ΔE 0.029
- Blood #770001 ΔE 0.037
- Burgundy #610023 ΔE 0.047
- Wine Red #7B0323 ΔE 0.054
- Chestnut #742802 ΔE 0.055
- Maroon #800000 ΔE 0.056
- Bordeaux #7B002C ΔE 0.063
Use #66150F 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.