#40304B
Closest named color: Space Cadet (#2B2D42). oklch(33.9% 0.051 310.9), rgb(64, 48, 75).
Aa
White text reads best on this color (12.05:1).
About this color
#40304B is a dark, muted purple. In OKLCH its lightness is 34%, its chroma 0.051 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.043 away. White text reads best on it, at 12.05:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | muted (0.051) |
| Temperature | in between |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.74:1 |
| White text | 12.05:1 |
Values
| HEX | #40304B |
| RGB | rgb(64, 48, 75) |
| HSL | hsl(276, 22%, 24%) |
| OKLCH | oklch(33.9% 0.051 310.9) |
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 #40304B | 12.05:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #40304B | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #40304B text on white | 12.05:1 | AAA | Lc 97.5 | Preferred for body text |
| #40304B text on black | 1.74:1 | 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
#F6F4F8
oklch(97% 0.006 308.4)
-
Step 100
100
#ECE8EF
oklch(93.6% 0.01 311.2)
-
Step 200
200
#DED5E4
oklch(88.5% 0.022 312.2)
-
Step 300
300
#C8BAD3
oklch(80.8% 0.038 310.4)
-
Step 400
400
#AD96BD
oklch(70.7% 0.061 311.3)
-
Step 500
500
#997CAC
oklch(63.1% 0.078 311.6)
-
Step 600
600
#836598
oklch(55.6% 0.084 310.7)
-
Step 700
700
#6F5482
oklch(49.2% 0.078 310.6)
-
Step 800
800
#5A4569
oklch(42.7% 0.063 310.5)
-
Step 900
900 (this color)
#40304B
oklch(33.9% 0.051 310.9)
-
Step 950
950
#2B2232
oklch(26.9% 0.032 309.9)
#40304B 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) | #2B354C | 0.037 |
| Deuteranopia (no green cones) | #2F374A | 0.035 |
| Tritanopia (no blue cones) | #3F343A | 0.037 |
| Achromatopsia (no color) | #363636 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40304B
#40304B
oklch(33.9% 0.051 310.9)
- #2E3D21
#2E3D21
oklch(33.9% 0.05 131.6)
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 #40304B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.043
- Gunmetal #293241 ΔE 0.046
- Onyx #343A40 ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.071
- Charcoal #264653 ΔE 0.073
Use #40304B 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.