#37355A
Closest named color: Prussian Blue (#1D3557). oklch(34.9% 0.064 285.1), rgb(55, 53, 90).
Aa
White text reads best on this color (11.54:1).
About this color
#37355A is a dark, muted purple. In OKLCH its lightness is 35%, its chroma 0.064 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.038 away. White text reads best on it, at 11.54:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.54:1 |
Values
| HEX | #37355A |
| RGB | rgb(55, 53, 90) |
| HSL | hsl(243, 26%, 28%) |
| OKLCH | oklch(34.9% 0.064 285.1) |
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 #37355A | 11.54:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #37355A | 1.81:1 | Fails | Lc 7.4 | Not readable |
| #37355A text on white | 11.54:1 | AAA | Lc 96.5 | Preferred for body text |
| #37355A 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D7D7EB
oklch(88.5% 0.027 285.8)
-
Step 300
300
#BDBDDF
oklch(80.9% 0.048 285.3)
-
Step 400
400
#9B9ACF
oklch(70.6% 0.077 285.1)
-
Step 500
500
#8381C2
oklch(63.1% 0.097 284.7)
-
Step 600
600
#6D69AF
oklch(55.5% 0.107 284.9)
-
Step 700
700
#5B5796
oklch(49% 0.099 285)
-
Step 800
800
#4B487A
oklch(42.8% 0.082 285.1)
-
Step 900
900 (this color)
#37355A
oklch(34.9% 0.064 285.1)
-
Step 950
950
#242439
oklch(27.1% 0.039 283.5)
#37355A 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) | #293A5B | 0.024 |
| Deuteranopia (no green cones) | #283859 | 0.024 |
| Tritanopia (no blue cones) | #2E3C43 | 0.054 |
| Achromatopsia (no color) | #393939 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37355A
#37355A
oklch(34.9% 0.064 285.1)
- #3F3C0E
#3F3C0E
oklch(34.9% 0.064 105.6)
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 #37355A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.047
- Gunmetal #293241 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.051
- Onyx #343A40 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.055
- Marine Blue #01386A ΔE 0.060
- Charcoal #264653 ΔE 0.061
Use #37355A 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.