#37355D
Closest named color: Prussian Blue (#1D3557). oklch(35.1% 0.069 284.6), rgb(55, 53, 93).
Aa
White text reads best on this color (11.47:1).
About this color
#37355D is a dark, muted purple. In OKLCH its lightness is 35%, its chroma 0.069 and its hue 285°. 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 11.47:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.82:1 |
| White text | 11.47:1 |
Values
| HEX | #37355D |
| RGB | rgb(55, 53, 93) |
| HSL | hsl(243, 27%, 29%) |
| OKLCH | oklch(35.1% 0.069 284.6) |
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 #37355D | 11.47:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #37355D | 1.82:1 | Fails | Lc 7.5 | Not readable |
| #37355D text on white | 11.47:1 | AAA | Lc 96.4 | Preferred for body text |
| #37355D 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
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7EC
oklch(88.5% 0.029 283.6)
-
Step 300
300
#BCBDE1
oklch(80.9% 0.051 284)
-
Step 400
400
#9A9AD3
oklch(70.7% 0.083 284.1)
-
Step 500
500
#8280C7
oklch(63.1% 0.106 284.2)
-
Step 600
600
#6D68B3
oklch(55.5% 0.114 285.1)
-
Step 700
700
#5B579A
oklch(49.2% 0.105 284.5)
-
Step 800
800
#4A477D
oklch(42.7% 0.088 284.5)
-
Step 900
900 (this color)
#37355D
oklch(35.1% 0.069 284.6)
-
Step 950
950
#24233B
oklch(26.9% 0.044 284.9)
#37355D 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) | #283B5F | 0.027 |
| Deuteranopia (no green cones) | #26385C | 0.026 |
| Tritanopia (no blue cones) | #2C3D44 | 0.060 |
| Achromatopsia (no color) | #393939 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37355D
#37355D
oklch(35.1% 0.069 284.6)
- #403C08
#403C08
oklch(35% 0.068 104.8)
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 #37355D, 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 0.051
- Space Cadet #2B2D42 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.056
- Gunmetal #293241 ΔE 0.056
- Marine Blue #01386A ΔE 0.058
- Onyx #343A40 ΔE 0.059
- Charcoal #264653 ΔE 0.064
Use #37355D 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.