#661900
Closest named color: Reddy Brown (#6E1005). oklch(34% 0.114 36.9), rgb(102, 25, 0).
Aa
White text reads best on this color (12.32:1).
About this color
#661900 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.114 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.021 away. White text reads best on it, at 12.32:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.114) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.70:1 |
| White text | 12.32:1 |
Values
| HEX | #661900 |
| RGB | rgb(102, 25, 0) |
| HSL | hsl(15, 100%, 20%) |
| OKLCH | oklch(34% 0.114 36.9) |
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 #661900 | 12.32:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #661900 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #661900 text on white | 12.32:1 | AAA | Lc 97.0 | Preferred for body text |
| #661900 text on black | 1.70:1 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE5DE
oklch(93.7% 0.025 39.4)
-
Step 200
200
#F7CFC3
oklch(88.5% 0.048 37.3)
-
Step 300
300
#F2AE9A
oklch(81% 0.085 37.1)
-
Step 400
400
#E87F61
oklch(70.7% 0.137 36.8)
-
Step 500
500
#DE5931
oklch(63.1% 0.175 37)
-
Step 600
600
#C83A00
oklch(55.6% 0.186 36.9)
-
Step 700
700
#A93000
oklch(49.1% 0.164 37)
-
Step 800
800
#8C2600
oklch(42.7% 0.143 37)
-
Step 900
900 (this color)
#661900
oklch(34% 0.114 36.9)
-
Step 950
950
#43170A
oklch(27.1% 0.072 37)
#661900 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) | #312A00 | 0.116 |
| Deuteranopia (no green cones) | #443B00 | 0.104 |
| Tritanopia (no blue cones) | #710015 | 0.042 |
| Achromatopsia (no color) | #353535 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661900
#661900
oklch(34% 0.114 36.9)
- #003F4C
#003F4C
oklch(33.9% 0.061 217)
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 #661900, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.021
- Blood #770001 ΔE 0.041
- Claret #680018 ΔE 0.044
- Chestnut #742802 ΔE 0.047
- Maroon #800000 ΔE 0.057
- Burgundy #610023 ΔE 0.063
- Wine Red #7B0323 ΔE 0.064
- Bordeaux #7B002C ΔE 0.075
Use #661900 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.