#910018
Closest named color: Blood Red (#980002). oklch(41.4% 0.167 23.7), rgb(145, 0, 24).
Aa
White text reads best on this color (9.47:1).
About this color
#910018 is a dark, vivid red. In OKLCH its lightness is 41%, its chroma 0.167 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Blood Red (#980002), ΔE 0.021 away. White text reads best on it, at 9.47:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | vivid (0.167) |
| Temperature | warm |
| Nearest name | Blood Red (#980002) |
| Black text | 2.21:1 |
| White text | 9.47:1 |
Values
| HEX | #910018 |
| RGB | rgb(145, 0, 24) |
| HSL | hsl(350, 100%, 28%) |
| OKLCH | oklch(41.4% 0.167 23.7) |
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 #910018 | 9.47:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #910018 | 2.21:1 | Fails | Lc 14.5 | Not readable |
| #910018 text on white | 9.47:1 | AAA | Lc 89.5 | Fine for body text |
| #910018 text on black | 2.21:1 | Fails | Lc -12.8 | 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 800.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FDE3E1
oklch(93.6% 0.029 23)
-
Step 200
200
#FBCCC8
oklch(88.5% 0.054 23.9)
-
Step 300
300
#FAA8A2
oklch(81% 0.098 24.1)
-
Step 400
400
#F27470
oklch(70.6% 0.156 23.7)
-
Step 500
500
#EA464A
oklch(63.1% 0.201 23.8)
-
Step 600
600
#D5132C
oklch(55.6% 0.217 23.8)
-
Step 700
700
#B70021
oklch(49.2% 0.199 23.8)
-
Step 800
800 (this color)
#910018
oklch(41.4% 0.167 23.7)
-
Step 900
900
#78181D
oklch(37.8% 0.13 23.6)
-
Step 950
950
#471111
oklch(27.1% 0.082 24.5)
#910018 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) | #393317 | 0.186 |
| Deuteranopia (no green cones) | #5A5011 | 0.168 |
| Tritanopia (no blue cones) | #A0000D | 0.034 |
| Achromatopsia (no color) | #464646 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #910018
#910018
oklch(41.4% 0.167 23.7)
- #00565D
#00565D
oklch(41.3% 0.07 204.4)
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 #910018, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blood Red #980002 ΔE 0.021
- Dark Red #8B0000 ΔE 0.022
- Brick Red #8F1402 ΔE 0.024
- Deep Red #9A0200 ΔE 0.026
- Carmine #9D0216 ΔE 0.027
- Red Wine #8C0034 ΔE 0.038
- Auburn #9B2226 ΔE 0.042
- Maroon #800000 ΔE 0.042
Use #910018 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.