#313751
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.3% 0.046 273.7), rgb(49, 55, 81).
Aa
White text reads best on this color (11.69:1).
About this color
#313751 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.046 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.029 away. White text reads best on it, at 11.69:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.79:1 |
| White text | 11.69:1 |
Values
| HEX | #313751 |
| RGB | rgb(49, 55, 81) |
| HSL | hsl(229, 25%, 25%) |
| OKLCH | oklch(34.3% 0.046 273.7) |
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 #313751 | 11.69:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #313751 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #313751 text on white | 11.69:1 | AAA | Lc 96.9 | Preferred for body text |
| #313751 text on black | 1.79:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F1
oklch(93.5% 0.011 274.9)
-
Step 200
200
#D5D9E6
oklch(88.6% 0.018 272.3)
-
Step 300
300
#B9C0D8
oklch(81% 0.035 272.7)
-
Step 400
400
#959FC4
oklch(70.7% 0.055 273.1)
-
Step 500
500
#7C87B5
oklch(63.2% 0.071 273.8)
-
Step 600
600
#6570A1
oklch(55.6% 0.077 273.9)
-
Step 700
700
#545E8A
oklch(49.2% 0.072 273.7)
-
Step 800
800
#454D70
oklch(42.8% 0.059 273.8)
-
Step 900
900 (this color)
#313751
oklch(34.3% 0.046 273.7)
-
Step 950
950
#222535
oklch(26.9% 0.03 276)
#313751 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) | #2F3A52 | 0.009 |
| Deuteranopia (no green cones) | #2C3750 | 0.008 |
| Tritanopia (no blue cones) | #283C40 | 0.041 |
| Achromatopsia (no color) | #383838 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313751
#313751
oklch(34.3% 0.046 273.7)
- #41381B
#41381B
oklch(34.3% 0.046 92.6)
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 #313751, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.031
- Gunmetal #293241 ΔE 0.034
- Onyx #343A40 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.039
- Midnight Green #073B4C ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Charcoal #264653 ΔE 0.049
Use #313751 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.