#313658
Closest named color: Prussian Blue (#1D3557). oklch(34.5% 0.06 276.4), rgb(49, 54, 88).
Aa
White text reads best on this color (11.67:1).
About this color
#313658 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.060 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.028 away. White text reads best on it, at 11.67:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.79:1 |
| White text | 11.67:1 |
Values
| HEX | #313658 |
| RGB | rgb(49, 54, 88) |
| HSL | hsl(232, 28%, 27%) |
| OKLCH | oklch(34.5% 0.06 276.4) |
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 #313658 | 11.67:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #313658 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #313658 text on white | 11.67:1 | AAA | Lc 96.8 | Preferred for body text |
| #313658 text on black | 1.79:1 | 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
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B8BFDE
oklch(80.9% 0.044 275.3)
-
Step 400
400
#949DCE
oklch(70.7% 0.072 276.3)
-
Step 500
500
#7B84C1
oklch(63.1% 0.092 277)
-
Step 600
600
#646DAD
oklch(55.5% 0.1 276.6)
-
Step 700
700
#535B95
oklch(49.1% 0.093 276.4)
-
Step 800
800
#444B79
oklch(42.8% 0.077 276.1)
-
Step 900
900 (this color)
#313658
oklch(34.5% 0.06 276.4)
-
Step 950
950
#212539
oklch(27% 0.038 274.9)
#313658 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) | #2A3A59 | 0.015 |
| Deuteranopia (no green cones) | #283757 | 0.014 |
| Tritanopia (no blue cones) | #253D43 | 0.052 |
| Achromatopsia (no color) | #383838 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313658
#313658
oklch(34.5% 0.06 276.4)
- #42390F
#42390F
oklch(34.5% 0.06 96.9)
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 #313658, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.037
- Gunmetal #293241 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.046
- Onyx #343A40 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.050
- Midnight Green #073B4C ΔE 0.053
- Marine Blue #01386A ΔE 0.053
Use #313658 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.