#313E61
Closest named color: Dark Grey Blue (#29465B). oklch(36.9% 0.063 267.8), rgb(49, 62, 97).
Aa
White text reads best on this color (10.54:1).
About this color
#313E61 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.063 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 10.54:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #313E61 |
| RGB | rgb(49, 62, 97) |
| HSL | hsl(224, 33%, 29%) |
| OKLCH | oklch(36.9% 0.063 267.8) |
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 #313E61 | 10.54:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #313E61 | 1.99:1 | Fails | Lc 9.5 | Not readable |
| #313E61 text on white | 10.54:1 | AAA | Lc 94.4 | Preferred for body text |
| #313E61 text on black | 1.99:1 | Fails | Lc -8.2 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B3C0E0
oklch(80.8% 0.047 267.8)
-
Step 400
400
#8C9FD1
oklch(70.6% 0.077 268.3)
-
Step 500
500
#7087C4
oklch(63.1% 0.096 267.8)
-
Step 600
600
#5970B1
oklch(55.6% 0.105 268.1)
-
Step 700
700
#495E98
oklch(49.2% 0.097 267.7)
-
Step 800
800
#3C4D7B
oklch(42.8% 0.08 267.6)
-
Step 900
900 (this color)
#313E61
oklch(36.9% 0.063 267.8)
-
Step 950
950
#1E263A
oklch(27.1% 0.039 267.1)
#313E61 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) | #314162 | 0.009 |
| Deuteranopia (no green cones) | #2C3D60 | 0.008 |
| Tritanopia (no blue cones) | #1F454B | 0.055 |
| Achromatopsia (no color) | #3F3F3F | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313E61
#313E61
oklch(36.9% 0.063 267.8)
- #4D3D12
#4D3D12
oklch(36.8% 0.063 88.1)
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 #313E61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Charcoal #264653 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.044
- Twilight Blue #0A437A ΔE 0.052
- Marine Blue #01386A ΔE 0.053
- Onyx #343A40 ΔE 0.056
- Midnight Green #073B4C ΔE 0.059
Use #313E61 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.