#313758
Closest named color: Prussian Blue (#1D3557). oklch(34.7% 0.058 275.1), rgb(49, 55, 88).
Aa
White text reads best on this color (11.55:1).
About this color
#313758 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.058 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 11.55:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.55:1 |
Values
| HEX | #313758 |
| RGB | rgb(49, 55, 88) |
| HSL | hsl(231, 28%, 27%) |
| OKLCH | oklch(34.7% 0.058 275.1) |
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 #313758 | 11.55:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #313758 | 1.81:1 | Fails | Lc 7.3 | Not readable |
| #313758 text on white | 11.55:1 | AAA | Lc 96.5 | Preferred for body text |
| #313758 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
#F4F5F9
oklch(97.1% 0.005 275)
-
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
#B8BFDD
oklch(80.9% 0.043 275)
-
Step 400
400
#949ECD
oklch(70.8% 0.07 275.2)
-
Step 500
500
#7A85C0
oklch(63.1% 0.09 275.4)
-
Step 600
600
#636EAC
oklch(55.6% 0.097 275.1)
-
Step 700
700
#525C94
oklch(49.2% 0.09 274.9)
-
Step 800
800
#434B78
oklch(42.7% 0.075 275.1)
-
Step 900
900 (this color)
#313758
oklch(34.7% 0.058 275.1)
-
Step 950
950
#212539
oklch(27% 0.038 274.9)
#313758 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) | #2C3B59 | 0.013 |
| Deuteranopia (no green cones) | #293857 | 0.012 |
| Tritanopia (no blue cones) | #253E43 | 0.052 |
| Achromatopsia (no color) | #393939 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313758
#313758
oklch(34.7% 0.058 275.1)
- #433911
#433911
oklch(34.6% 0.058 95.1)
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 #313758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.036
- Gunmetal #293241 ΔE 0.044
- Onyx #343A40 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.047
- Midnight Green #073B4C ΔE 0.052
- Charcoal #264653 ΔE 0.052
Use #313758 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.