#313C48
Closest named color: Onyx (#343A40). oklch(35.1% 0.026 250.8), rgb(49, 60, 72).
Aa
White text reads best on this color (11.22:1).
About this color
#313C48 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.014 away. White text reads best on it, at 11.22:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #313C48 |
| RGB | rgb(49, 60, 72) |
| HSL | hsl(211, 19%, 24%) |
| OKLCH | oklch(35.1% 0.026 250.8) |
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 #313C48 | 11.22:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #313C48 | 1.87:1 | Fails | Lc 8.0 | Not readable |
| #313C48 text on white | 11.22:1 | AAA | Lc 95.9 | Preferred for body text |
| #313C48 text on black | 1.87:1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D4DAE0
oklch(88.6% 0.011 247.9)
-
Step 300
300
#B8C2CD
oklch(81% 0.019 250.6)
-
Step 400
400
#93A2B4
oklch(70.6% 0.031 253)
-
Step 500
500
#788CA1
oklch(63.2% 0.039 249.7)
-
Step 600
600
#61768C
oklch(55.7% 0.042 249.8)
-
Step 700
700
#506377
oklch(49.2% 0.04 250)
-
Step 800
800
#425161
oklch(42.8% 0.033 250.3)
-
Step 900
900 (this color)
#313C48
oklch(35.1% 0.026 250.8)
-
Step 950
950
#21272E
oklch(27% 0.016 252.4)
#313C48 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) | #383C49 | 0.011 |
| Deuteranopia (no green cones) | #353A48 | 0.009 |
| Tritanopia (no blue cones) | #2A3F40 | 0.022 |
| Achromatopsia (no color) | #3B3B3B | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313C48
#313C48
oklch(35.1% 0.026 250.8)
- #44392C
#44392C
oklch(35.2% 0.026 71.5)
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 #313C48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.014
- Dark Blue Grey #1F3B4D ΔE 0.025
- Charcoal Grey #3C4142 ΔE 0.029
- Charcoal #264653 ΔE 0.033
- Gunmetal #293241 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.039
- Midnight Green #073B4C ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.049
Use #313C48 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.