#642421
Closest named color: Reddy Brown (#6E1005). oklch(35.5% 0.093 25.7), rgb(100, 36, 33).
Aa
White text reads best on this color (11.56:1).
About this color
#642421 is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.093 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.037 away. White text reads best on it, at 11.56:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.093) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.81:1 |
| White text | 11.56:1 |
Values
| HEX | #642421 |
| RGB | rgb(100, 36, 33) |
| HSL | hsl(3, 50%, 26%) |
| OKLCH | oklch(35.5% 0.093 25.7) |
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 #642421 | 11.56:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #642421 | 1.81:1 | Fails | Lc 7.9 | Not readable |
| #642421 text on white | 11.56:1 | AAA | Lc 96.0 | Preferred for body text |
| #642421 text on black | 1.81:1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F2D0CC
oklch(88.5% 0.039 25.8)
-
Step 300
300
#EBB0A9
oklch(81% 0.07 26.4)
-
Step 400
400
#DE847C
oklch(70.7% 0.112 25.7)
-
Step 500
500
#D2625B
oklch(63.1% 0.143 25.6)
-
Step 600
600
#BD4541
oklch(55.5% 0.156 25.4)
-
Step 700
700
#A33633
oklch(49.1% 0.145 25.6)
-
Step 800
800
#842E2A
oklch(42.7% 0.119 26.1)
-
Step 900
900 (this color)
#642421
oklch(35.5% 0.093 25.7)
-
Step 950
950
#3F1917
oklch(27% 0.06 24.9)
#642421 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) | #343020 | 0.100 |
| Deuteranopia (no green cones) | #443E1F | 0.092 |
| Tritanopia (no blue cones) | #6E1724 | 0.030 |
| Achromatopsia (no color) | #393939 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642421
#642421
oklch(35.5% 0.093 25.7)
- #00454B
#00454B
oklch(35.6% 0.061 204.7)
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 #642421, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.037
- Chestnut #742802 ΔE 0.048
- Claret #680018 ΔE 0.049
- Blood #770001 ΔE 0.054
- Wine Red #7B0323 ΔE 0.058
- Burgundy #610023 ΔE 0.060
- Purple Brown #673A3F ΔE 0.060
- Bordeaux #7B002C ΔE 0.065
Use #642421 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.