#37375A
Closest named color: Prussian Blue (#1D3557). oklch(35.4% 0.06 282.9), rgb(55, 55, 90).
Aa
White text reads best on this color (11.31:1).
About this color
#37375A is a dark, muted purple. In OKLCH its lightness is 35%, its chroma 0.060 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.039 away. White text reads best on it, at 11.31:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.85:1 |
| White text | 11.31:1 |
Values
| HEX | #37375A |
| RGB | rgb(55, 55, 90) |
| HSL | hsl(240, 24%, 28%) |
| OKLCH | oklch(35.4% 0.06 282.9) |
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 #37375A | 11.31:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #37375A | 1.85:1 | Fails | Lc 7.8 | Not readable |
| #37375A text on white | 11.31:1 | AAA | Lc 96.1 | Preferred for body text |
| #37375A text on black | 1.85:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EA
oklch(88.4% 0.026 283.4)
-
Step 300
300
#BCBEDE
oklch(81% 0.045 282.5)
-
Step 400
400
#9A9BCD
oklch(70.7% 0.073 283.5)
-
Step 500
500
#8182C0
oklch(63.1% 0.093 282.7)
-
Step 600
600
#6B6BAC
oklch(55.6% 0.1 282.7)
-
Step 700
700
#595994
oklch(49.1% 0.093 282.4)
-
Step 800
800
#494978
oklch(42.7% 0.077 282.6)
-
Step 900
900 (this color)
#37375A
oklch(35.4% 0.06 282.9)
-
Step 950
950
#242439
oklch(27.1% 0.039 283.5)
#37375A 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) | #2C3C5B | 0.021 |
| Deuteranopia (no green cones) | #2A3959 | 0.020 |
| Tritanopia (no blue cones) | #2D3E44 | 0.053 |
| Achromatopsia (no color) | #3A3A3A | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37375A
#37375A
oklch(35.4% 0.06 282.9)
- #413D13
#413D13
oklch(35.4% 0.06 103.9)
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 #37375A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.049
- Onyx #343A40 ΔE 0.051
- Gunmetal #293241 ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.054
- Charcoal #264653 ΔE 0.056
- Marine Blue #01386A ΔE 0.060
Use #37375A 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.