#37355B
Closest named color: Prussian Blue (#1D3557). oklch(35% 0.065 284.9), rgb(55, 53, 91).
Aa
White text reads best on this color (11.52:1).
About this color
#37355B is a dark, muted purple. In OKLCH its lightness is 35%, its chroma 0.065 and its hue 285°. 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 11.52:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.82:1 |
| White text | 11.52:1 |
Values
| HEX | #37355B |
| RGB | rgb(55, 53, 91) |
| HSL | hsl(243, 26%, 28%) |
| OKLCH | oklch(35% 0.065 284.9) |
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 #37355B | 11.52:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #37355B | 1.82:1 | Fails | Lc 7.4 | Not readable |
| #37355B text on white | 11.52:1 | AAA | Lc 96.5 | Preferred for body text |
| #37355B text on black | 1.82:1 | 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
#BDBDE0
oklch(81% 0.049 285.3)
-
Step 400
400
#9B9AD0
oklch(70.7% 0.078 285.1)
-
Step 500
500
#8380C4
oklch(63% 0.101 285.1)
-
Step 600
600
#6D69B0
oklch(55.6% 0.109 284.9)
-
Step 700
700
#5B5798
oklch(49.1% 0.102 284.8)
-
Step 800
800
#4A487B
oklch(42.8% 0.083 284.1)
-
Step 900
900 (this color)
#37355B
oklch(35% 0.065 284.9)
-
Step 950
950
#24233A
oklch(26.9% 0.042 285.2)
#37355B 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) | #293A5C | 0.024 |
| Deuteranopia (no green cones) | #28385A | 0.024 |
| Tritanopia (no blue cones) | #2D3C43 | 0.056 |
| Achromatopsia (no color) | #393939 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37355B
#37355B
oklch(35% 0.065 284.9)
- #403C0C
#403C0C
oklch(35% 0.066 104.5)
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 #37355B, 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 0.049
- Space Cadet #2B2D42 ΔE 0.053
- Gunmetal #293241 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.055
- Onyx #343A40 ΔE 0.055
- Marine Blue #01386A ΔE 0.059
- Charcoal #264653 ΔE 0.062
Use #37355B 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.