#313F53
Closest named color: Dark Grey Blue (#29465B). oklch(36.4% 0.039 257.3), rgb(49, 63, 83).
Aa
White text reads best on this color (10.67:1).
About this color
#313F53 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.039 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.023 away. White text reads best on it, at 10.67:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.96:1 |
| White text | 10.67:1 |
Values
| HEX | #313F53 |
| RGB | rgb(49, 63, 83) |
| HSL | hsl(215, 26%, 26%) |
| OKLCH | oklch(36.4% 0.039 257.3) |
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 #313F53 | 10.67:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #313F53 | 1.96:1 | Fails | Lc 9.2 | Not readable |
| #313F53 text on white | 10.67:1 | AAA | Lc 94.7 | Preferred for body text |
| #313F53 text on black | 1.96:1 | Fails | Lc -7.9 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B5C2D4
oklch(81% 0.029 256.5)
-
Step 400
400
#8EA2BE
oklch(70.6% 0.047 256.8)
-
Step 500
500
#728BAE
oklch(63% 0.06 256.8)
-
Step 600
600
#5B759A
oklch(55.7% 0.065 257.2)
-
Step 700
700
#4A6283
oklch(49.1% 0.061 256.5)
-
Step 800
800
#3D506B
oklch(42.7% 0.051 257.2)
-
Step 900
900 (this color)
#313F53
oklch(36.4% 0.039 257.3)
-
Step 950
950
#1F2733
oklch(27.1% 0.025 258.3)
#313F53 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) | #384054 | 0.011 |
| Deuteranopia (no green cones) | #343D53 | 0.007 |
| Tritanopia (no blue cones) | #264346 | 0.034 |
| Achromatopsia (no color) | #3E3E3E | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313F53
#313F53
oklch(36.4% 0.039 257.3)
- #4A3C26
#4A3C26
oklch(36.5% 0.04 78.3)
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 #313F53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.023
- Charcoal #264653 ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.030
- Onyx #343A40 ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.046
- Midnight Green #073B4C ΔE 0.048
- Gunmetal #293241 ΔE 0.050
Use #313F53 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.