#31365D
Closest named color: Prussian Blue (#1D3557). oklch(34.8% 0.068 276.7), rgb(49, 54, 93).
Aa
White text reads best on this color (11.56:1).
About this color
#31365D is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.068 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.031 away. White text reads best on it, at 11.56:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.56:1 |
Values
| HEX | #31365D |
| RGB | rgb(49, 54, 93) |
| HSL | hsl(233, 31%, 28%) |
| OKLCH | oklch(34.8% 0.068 276.7) |
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 #31365D | 11.56:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #31365D | 1.81:1 | Fails | Lc 7.3 | Not readable |
| #31365D text on white | 11.56:1 | AAA | Lc 96.5 | Preferred for body text |
| #31365D 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8EC
oklch(88.5% 0.028 276.8)
-
Step 300
300
#B7BEE2
oklch(80.8% 0.051 276.5)
-
Step 400
400
#939CD4
oklch(70.6% 0.083 277)
-
Step 500
500
#7983C8
oklch(63% 0.104 276.7)
-
Step 600
600
#636CB5
oklch(55.7% 0.113 276.7)
-
Step 700
700
#525A9C
oklch(49.2% 0.105 276.6)
-
Step 800
800
#43497E
oklch(42.6% 0.088 277.1)
-
Step 900
900 (this color)
#31365D
oklch(34.8% 0.068 276.7)
-
Step 950
950
#21243B
oklch(26.9% 0.043 277.4)
#31365D 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 | 0.018 |
| Deuteranopia (no green cones) | #25375C | 0.017 |
| Tritanopia (no blue cones) | #223E45 | 0.060 |
| Achromatopsia (no color) | #393939 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31365D
#31365D
oklch(34.8% 0.068 276.7)
- #443A05
#443A05
oklch(34.9% 0.068 97.6)
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 #31365D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.044
- Marine Blue #01386A ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.052
- Gunmetal #293241 ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.053
- Onyx #343A40 ΔE 0.057
- Midnight Green #073B4C ΔE 0.058
Use #31365D 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.