#313651
Closest named color: Prussian Blue (#1D3557). oklch(34.1% 0.048 275.5), rgb(49, 54, 81).
Aa
White text reads best on this color (11.81:1).
About this color
#313651 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.048 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.030 away. White text reads best on it, at 11.81:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.77:1 |
| White text | 11.81:1 |
Values
| HEX | #313651 |
| RGB | rgb(49, 54, 81) |
| HSL | hsl(231, 25%, 25%) |
| OKLCH | oklch(34.1% 0.048 275.5) |
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 #313651 | 11.81:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #313651 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #313651 text on white | 11.81:1 | AAA | Lc 97.1 | Preferred for body text |
| #313651 text on black | 1.77:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D5D8E7
oklch(88.4% 0.021 276.9)
-
Step 300
300
#BABFD8
oklch(80.9% 0.036 276.6)
-
Step 400
400
#969EC5
oklch(70.7% 0.058 275.8)
-
Step 500
500
#7D86B6
oklch(63.1% 0.073 275.9)
-
Step 600
600
#666FA2
oklch(55.5% 0.08 275.8)
-
Step 700
700
#555D8B
oklch(49.1% 0.074 275.8)
-
Step 800
800
#454C71
oklch(42.7% 0.062 275.3)
-
Step 900
900 (this color)
#313651
oklch(34.1% 0.048 275.5)
-
Step 950
950
#222535
oklch(26.9% 0.03 276)
#313651 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) | #2D3952 | 0.010 |
| Deuteranopia (no green cones) | #2B3650 | 0.010 |
| Tritanopia (no blue cones) | #283B40 | 0.041 |
| Achromatopsia (no color) | #373737 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313651
#313651
oklch(34.1% 0.048 275.5)
- #403819
#403819
oklch(34.1% 0.048 95.2)
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 #313651, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.030
- Gunmetal #293241 ΔE 0.033
- Onyx #343A40 ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.037
- Midnight Green #073B4C ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.050
- Charcoal #264653 ΔE 0.052
Use #313651 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.