#333648
Closest named color: Onyx (#343A40). oklch(33.8% 0.032 277.2), rgb(51, 54, 72).
Aa
White text reads best on this color (11.91:1).
About this color
#333648 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.032 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.023 away. White text reads best on it, at 11.91:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.76:1 |
| White text | 11.91:1 |
Values
| HEX | #333648 |
| RGB | rgb(51, 54, 72) |
| HSL | hsl(231, 17%, 24%) |
| OKLCH | oklch(33.8% 0.032 277.2) |
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 #333648 | 11.91:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #333648 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #333648 text on white | 11.91:1 | AAA | Lc 97.3 | Preferred for body text |
| #333648 text on black | 1.76:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EF
oklch(93.5% 0.008 278.6)
-
Step 200
200
#D7D8E2
oklch(88.4% 0.014 281.5)
-
Step 300
300
#BCC0D0
oklch(81% 0.023 274.7)
-
Step 400
400
#9A9FB9
oklch(70.7% 0.038 276.8)
-
Step 500
500
#8287A7
oklch(63.1% 0.048 278)
-
Step 600
600
#6B7193
oklch(55.7% 0.053 276.7)
-
Step 700
700
#595E7D
oklch(49% 0.05 277.3)
-
Step 800
800
#494D66
oklch(42.7% 0.042 277.4)
-
Step 900
900 (this color)
#333648
oklch(33.8% 0.032 277.2)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#333648 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) | #313849 | 0.007 |
| Deuteranopia (no green cones) | #303648 | 0.005 |
| Tritanopia (no blue cones) | #2E393C | 0.028 |
| Achromatopsia (no color) | #373737 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333648
#333648
oklch(33.8% 0.032 277.2)
- #3C3824
#3C3824
oklch(33.9% 0.033 98.2)
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 #333648, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.023
- Gunmetal #293241 ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.045
- Midnight Green #073B4C ΔE 0.047
- Charcoal #264653 ΔE 0.051
Use #333648 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.