#B64538
Closest named color: Dull Red (#BB3F3F). oklch(54.2% 0.149 29.4), rgb(182, 69, 56).
Aa
White text reads best on this color (5.38:1).
About this color
#B64538 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.149 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.018 away. White text reads best on it, at 5.38:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.149) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.89:1 |
| White text | 5.38:1 |
Values
| HEX | #B64538 |
| RGB | rgb(182, 69, 56) |
| HSL | hsl(6, 53%, 47%) |
| OKLCH | oklch(54.2% 0.149 29.4) |
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 #B64538 | 5.38:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #B64538 | 3.89:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #B64538 text on white | 5.38:1 | AA | Lc 76.0 | Fine for body text |
| #B64538 text on black | 3.89:1 | AA large text | Lc -25.7 | 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 600.
-
Step 50
50
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F1D1CB
oklch(88.6% 0.037 30.4)
-
Step 300
300
#E9B1A8
oklch(80.9% 0.067 29)
-
Step 400
400
#DB8679
oklch(70.6% 0.107 29.4)
-
Step 500
500
#CF6557
oklch(63.1% 0.137 29.2)
-
Step 600
600 (this color)
#B64538
oklch(54.2% 0.149 29.4)
-
Step 700
700
#A03A2E
oklch(49.1% 0.138 29.6)
-
Step 800
800
#823127
oklch(42.7% 0.114 29.6)
-
Step 900
900
#692C24
oklch(37.7% 0.089 29.5)
-
Step 950
950
#3E1A16
oklch(27% 0.057 28)
#B64538 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) | #635B36 | 0.157 |
| Deuteranopia (no green cones) | #7F7335 | 0.143 |
| Tritanopia (no blue cones) | #C82B43 | 0.053 |
| Achromatopsia (no color) | #6A6A6A | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B64538
#B64538
oklch(54.2% 0.149 29.4)
- #007E8D
#007E8D
oklch(54.3% 0.094 209.3)
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 #B64538, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.018
- Dusty Red #B9484E ΔE 0.027
- Sinopia #BB3E03 ΔE 0.035
- Brick Orange #C14A09 ΔE 0.044
- Dark Rose #B5485D ΔE 0.047
- Rusty Red #AF2F0D ΔE 0.048
- Burnt Orange #C04E01 ΔE 0.050
- Cinnamon #AC4F06 ΔE 0.051
Use #B64538 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.