#40375F
Closest named color: Prussian Blue (#1D3557). oklch(36.5% 0.068 293.1), rgb(64, 55, 95).
Aa
White text reads best on this color (10.88:1).
About this color
#40375F is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.068 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.056 away. White text reads best on it, at 10.88:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.068) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.92:1 |
| White text | 10.88:1 |
Values
| HEX | #40375F |
| RGB | rgb(64, 55, 95) |
| HSL | hsl(253, 27%, 29%) |
| OKLCH | oklch(36.5% 0.068 293.1) |
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 #40375F | 10.88:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #40375F | 1.92:1 | Fails | Lc 8.8 | Not readable |
| #40375F text on white | 10.88:1 | AAA | Lc 95.1 | Preferred for body text |
| #40375F text on black | 1.92:1 | Fails | Lc -7.5 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F3
oklch(93.6% 0.015 294.5)
-
Step 200
200
#D9D6EB
oklch(88.5% 0.029 292.4)
-
Step 300
300
#C1BBDF
oklch(80.9% 0.051 292.9)
-
Step 400
400
#A297CF
oklch(70.6% 0.082 293.2)
-
Step 500
500
#8C7DC3
oklch(63.1% 0.104 293)
-
Step 600
600
#7665AF
oklch(55.5% 0.113 292.9)
-
Step 700
700
#645497
oklch(49.2% 0.105 293.1)
-
Step 800
800
#51457A
oklch(42.7% 0.087 292.8)
-
Step 900
900 (this color)
#40375F
oklch(36.5% 0.068 293.1)
-
Step 950
950
#27223A
oklch(26.9% 0.044 292.7)
#40375F 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) | #2B3D61 | 0.035 |
| Deuteranopia (no green cones) | #2C3C5E | 0.034 |
| Tritanopia (no blue cones) | #393E46 | 0.056 |
| Achromatopsia (no color) | #3D3D3D | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40375F
#40375F
oklch(36.5% 0.068 293.1)
- #3F4212
#3F4212
oklch(36.5% 0.068 112.7)
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 #40375F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.062
- Onyx #343A40 ΔE 0.063
- Charcoal #264653 ΔE 0.066
- Gunmetal #293241 ΔE 0.068
- Charcoal Grey #3C4142 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.068
Use #40375F 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.