#313F62
Closest named color: Dark Grey Blue (#29465B). oklch(37.2% 0.063 266.8), rgb(49, 63, 98).
Aa
White text reads best on this color (10.40:1).
About this color
#313F62 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.063 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 10.40:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.01:1 |
| White text | 10.40:1 |
Values
| HEX | #313F62 |
| RGB | rgb(49, 63, 98) |
| HSL | hsl(223, 33%, 29%) |
| OKLCH | oklch(37.2% 0.063 266.8) |
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 #313F62 | 10.40:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #313F62 | 2.01:1 | Fails | Lc 9.8 | Not readable |
| #313F62 text on white | 10.40:1 | AAA | Lc 94.1 | Preferred for body text |
| #313F62 text on black | 2.01:1 | Fails | Lc -8.5 | 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
#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
#8BA0D1
oklch(70.8% 0.076 266.5)
-
Step 500
500
#6F87C5
oklch(63% 0.098 267.4)
-
Step 600
600
#5770B1
oklch(55.5% 0.106 267)
-
Step 700
700
#475E98
oklch(49.1% 0.097 266.5)
-
Step 800
800
#3B4D7C
oklch(42.8% 0.082 267.1)
-
Step 900
900 (this color)
#313F62
oklch(37.2% 0.063 266.8)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#313F62 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) | #324263 | 0.010 |
| Deuteranopia (no green cones) | #2D3E61 | 0.007 |
| Tritanopia (no blue cones) | #1E464C | 0.055 |
| Achromatopsia (no color) | #404040 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313F62
#313F62
oklch(37.2% 0.063 266.8)
- #4F3E13
#4F3E13
oklch(37.3% 0.064 86.9)
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 #313F62, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.050
- Marine Blue #01386A ΔE 0.054
- Onyx #343A40 ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.060
Use #313F62 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.