#313D4D
Closest named color: Onyx (#343A40). oklch(35.6% 0.032 255.7), rgb(49, 61, 77).
Aa
White text reads best on this color (11.02:1).
About this color
#313D4D is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.032 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.022 away. White text reads best on it, at 11.02:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #313D4D |
| RGB | rgb(49, 61, 77) |
| HSL | hsl(214, 22%, 25%) |
| OKLCH | oklch(35.6% 0.032 255.7) |
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 #313D4D | 11.02:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #313D4D | 1.90:1 | Fails | Lc 8.4 | Not readable |
| #313D4D text on white | 11.02:1 | AAA | Lc 95.5 | Preferred for body text |
| #313D4D text on black | 1.90:1 | 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
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B7C2D0
oklch(81% 0.023 254.4)
-
Step 400
400
#91A2B9
oklch(70.7% 0.039 256)
-
Step 500
500
#768BA7
oklch(63% 0.049 255.7)
-
Step 600
600
#5F7593
oklch(55.6% 0.054 256.3)
-
Step 700
700
#4E627D
oklch(49.1% 0.05 256)
-
Step 800
800
#405066
oklch(42.7% 0.042 256.4)
-
Step 900
900 (this color)
#313D4D
oklch(35.6% 0.032 255.7)
-
Step 950
950
#202730
oklch(27% 0.02 254.8)
#313D4D 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) | #373E4E | 0.010 |
| Deuteranopia (no green cones) | #343B4D | 0.008 |
| Tritanopia (no blue cones) | #294042 | 0.027 |
| Achromatopsia (no color) | #3C3C3C | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313D4D
#313D4D
oklch(35.6% 0.032 255.7)
- #463A29
#463A29
oklch(35.6% 0.032 76)
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 #313D4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.025
- Charcoal #264653 ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.032
- Gunmetal #293241 ΔE 0.041
- Midnight Green #073B4C ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.046
Use #313D4D 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.