#B70100
Closest named color: Scarlet (#BE0119). oklch(49% 0.201 29.3), rgb(183, 1, 0).
Aa
White text reads best on this color (6.95:1).
About this color
#B70100 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.201 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.020 away. White text reads best on it, at 6.95:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.201) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.01:1 |
| White text | 6.95:1 |
Values
| HEX | #B70100 |
| RGB | rgb(183, 1, 0) |
| HSL | hsl(0, 100%, 36%) |
| OKLCH | oklch(49% 0.201 29.3) |
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 #B70100 | 6.95:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #B70100 | 3.01:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #B70100 text on white | 6.95:1 | AA | Lc 81.3 | Fine for body text |
| #B70100 text on black | 3.01:1 | AA large text | Lc -20.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE3DF
oklch(93.5% 0.028 28.5)
-
Step 200
200
#FBCDC5
oklch(88.6% 0.054 29.6)
-
Step 300
300
#F9A99C
oklch(80.9% 0.097 29.5)
-
Step 400
400
#F27666
oklch(70.7% 0.156 29.1)
-
Step 500
500
#E94A3A
oklch(63.2% 0.198 29.4)
-
Step 600
600
#D41B12
oklch(55.5% 0.216 29.3)
-
Step 700
700 (this color)
#B70100
oklch(49% 0.201 29.3)
-
Step 800
800
#950F09
oklch(42.7% 0.166 29.2)
-
Step 900
900
#781A12
oklch(37.8% 0.13 29.4)
-
Step 950
950
#46120C
oklch(27% 0.081 29.8)
#B70100 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) | #4C4200 | 0.220 |
| Deuteranopia (no green cones) | #746600 | 0.194 |
| Tritanopia (no blue cones) | #CB0008 | 0.043 |
| Achromatopsia (no color) | #595959 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B70100
#B70100
oklch(49% 0.201 29.3)
- #006D7A
#006D7A
oklch(49% 0.084 209.1)
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 #B70100, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.020
- Rufous #AE2012 ΔE 0.022
- Firebrick #B22222 ΔE 0.024
- Rust Red #AA2704 ΔE 0.033
- Rusty Red #AF2F0D ΔE 0.037
- Lipstick Red #C0022F ΔE 0.038
- Brown #A52A2A ΔE 0.044
- Burnt Red #9F2305 ΔE 0.049
Use #B70100 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.