#313C62
Closest named color: Dark Grey Blue (#29465B). oklch(36.5% 0.067 270.5), rgb(49, 60, 98).
Aa
White text reads best on this color (10.75:1).
About this color
#313C62 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.067 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 10.75:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #313C62 |
| RGB | rgb(49, 60, 98) |
| HSL | hsl(227, 33%, 29%) |
| OKLCH | oklch(36.5% 0.067 270.5) |
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 #313C62 | 10.75:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #313C62 | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #313C62 text on white | 10.75:1 | AAA | Lc 94.8 | Preferred for body text |
| #313C62 text on black | 1.95:1 | Fails | Lc -7.8 | 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
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B4C0E2
oklch(81% 0.05 269.9)
-
Step 400
400
#8D9ED4
oklch(70.6% 0.082 270.7)
-
Step 500
500
#7286C8
oklch(63.2% 0.102 270.4)
-
Step 600
600
#5B6EB5
oklch(55.5% 0.113 271)
-
Step 700
700
#4A5C9C
oklch(49.1% 0.105 270.3)
-
Step 800
800
#3D4B7E
oklch(42.6% 0.087 270.8)
-
Step 900
900 (this color)
#313C62
oklch(36.5% 0.067 270.5)
-
Step 950
950
#1E253B
oklch(26.9% 0.042 269.9)
#313C62 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) | #2E4064 | 0.012 |
| Deuteranopia (no green cones) | #293C61 | 0.011 |
| Tritanopia (no blue cones) | #1E444A | 0.061 |
| Achromatopsia (no color) | #3E3E3E | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313C62
#313C62
oklch(36.5% 0.067 270.5)
- #4C3D0B
#4C3D0B
oklch(36.6% 0.068 91.2)
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 #313C62, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.046
- Charcoal #264653 ΔE 0.048
- Marine Blue #01386A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Onyx #343A40 ΔE 0.059
- Midnight Green #073B4C ΔE 0.060
Use #313C62 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.