#37375D
Closest named color: Prussian Blue (#1D3557). oklch(35.5% 0.065 282.6), rgb(55, 55, 93).
Aa
White text reads best on this color (11.24:1).
About this color
#37375D is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.065 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.040 away. White text reads best on it, at 11.24:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #37375D |
| RGB | rgb(55, 55, 93) |
| HSL | hsl(240, 26%, 29%) |
| OKLCH | oklch(35.5% 0.065 282.6) |
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 #37375D | 11.24:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #37375D | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #37375D text on white | 11.24:1 | AAA | Lc 95.9 | Preferred for body text |
| #37375D text on black | 1.86:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EB
oklch(88.4% 0.027 283.5)
-
Step 300
300
#BBBDE0
oklch(80.8% 0.049 282.7)
-
Step 400
400
#999BD1
oklch(70.8% 0.079 282.5)
-
Step 500
500
#8081C4
oklch(63% 0.1 282.5)
-
Step 600
600
#6A6AB1
oklch(55.6% 0.109 282.3)
-
Step 700
700
#595898
oklch(49.1% 0.101 282.7)
-
Step 800
800
#49487B
oklch(42.7% 0.083 283.2)
-
Step 900
900 (this color)
#37375D
oklch(35.5% 0.065 282.6)
-
Step 950
950
#23243A
oklch(27% 0.041 281.3)
#37375D 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) | #2A3C5E | 0.023 |
| Deuteranopia (no green cones) | #29395C | 0.021 |
| Tritanopia (no blue cones) | #2C3E45 | 0.056 |
| Achromatopsia (no color) | #3B3B3B | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37375D
#37375D
oklch(35.5% 0.065 282.6)
- #433D0D
#433D0D
oklch(35.6% 0.066 102)
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 #37375D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.050
- Onyx #343A40 ΔE 0.056
- Gunmetal #293241 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.057
- Marine Blue #01386A ΔE 0.058
- Charcoal #264653 ΔE 0.058
Use #37375D 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.