#313E50
Closest named color: Charcoal (#264653). oklch(36% 0.036 256.6), rgb(49, 62, 80).
Aa
White text reads best on this color (10.85:1).
About this color
#313E50 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.036 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.027 away. White text reads best on it, at 10.85:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.93:1 |
| White text | 10.85:1 |
Values
| HEX | #313E50 |
| RGB | rgb(49, 62, 80) |
| HSL | hsl(215, 24%, 25%) |
| OKLCH | oklch(36% 0.036 256.6) |
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 #313E50 | 10.85:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #313E50 | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #313E50 text on white | 10.85:1 | AAA | Lc 95.1 | Preferred for body text |
| #313E50 text on black | 1.93:1 | Fails | Lc -7.5 | 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
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3DAE3
oklch(88.6% 0.015 254.6)
-
Step 300
300
#B6C2D2
oklch(81% 0.026 255.6)
-
Step 400
400
#90A2BC
oklch(70.7% 0.043 257.5)
-
Step 500
500
#748BAB
oklch(63.1% 0.055 256.7)
-
Step 600
600
#5D7596
oklch(55.6% 0.059 256.5)
-
Step 700
700
#4C6280
oklch(49.1% 0.055 256.3)
-
Step 800
800
#3F5068
oklch(42.7% 0.045 257)
-
Step 900
900 (this color)
#313E50
oklch(36% 0.036 256.6)
-
Step 950
950
#1F2732
oklch(27% 0.024 256.4)
#313E50 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) | #383F51 | 0.012 |
| Deuteranopia (no green cones) | #343C50 | 0.007 |
| Tritanopia (no blue cones) | #274244 | 0.032 |
| Achromatopsia (no color) | #3D3D3D | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313E50
#313E50
oklch(36% 0.036 256.6)
- #483B28
#483B28
oklch(36.1% 0.035 76.7)
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 #313E50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.027
- Onyx #343A40 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.033
- Gunmetal #293241 ΔE 0.045
- Midnight Green #073B4C ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.046
Use #313E50 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.