#313D50
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.8% 0.037 259.5), rgb(49, 61, 80).
Aa
White text reads best on this color (10.97:1).
About this color
#313D50 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.037 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.026 away. White text reads best on it, at 10.97:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.91:1 |
| White text | 10.97:1 |
Values
| HEX | #313D50 |
| RGB | rgb(49, 61, 80) |
| HSL | hsl(217, 24%, 25%) |
| OKLCH | oklch(35.8% 0.037 259.5) |
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 #313D50 | 10.97:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #313D50 | 1.91:1 | Fails | Lc 8.5 | Not readable |
| #313D50 text on white | 10.97:1 | AAA | Lc 95.4 | Preferred for body text |
| #313D50 text on black | 1.91:1 | Fails | Lc 0.0 | 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
#D3DAE4
oklch(88.6% 0.016 257.2)
-
Step 300
300
#B6C1D3
oklch(80.8% 0.028 260.3)
-
Step 400
400
#91A2BD
oklch(70.8% 0.044 259.6)
-
Step 500
500
#758BAC
oklch(63.2% 0.056 258.3)
-
Step 600
600
#5E7498
oklch(55.6% 0.062 260.1)
-
Step 700
700
#4D6181
oklch(48.9% 0.057 259.6)
-
Step 800
800
#405069
oklch(42.8% 0.046 259.2)
-
Step 900
900 (this color)
#313D50
oklch(35.8% 0.037 259.5)
-
Step 950
950
#202732
oklch(27.1% 0.023 259.3)
#313D50 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) | #363E51 | 0.009 |
| Deuteranopia (no green cones) | #333B50 | 0.007 |
| Tritanopia (no blue cones) | #274143 | 0.033 |
| Achromatopsia (no color) | #3C3C3C | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313D50
#313D50
oklch(35.8% 0.037 259.5)
- #473A26
#473A26
oklch(35.7% 0.037 77.9)
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 #313D50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.026
- Onyx #343A40 ΔE 0.027
- Charcoal #264653 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal Grey #3C4142 ΔE 0.035
- Gunmetal #293241 ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.043
- Midnight Green #073B4C ΔE 0.045
Use #313D50 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.