#353A4D
Closest named color: Onyx (#343A40). oklch(35.2% 0.034 273.1), rgb(53, 58, 77).
Aa
White text reads best on this color (11.26:1).
About this color
#353A4D is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.034 and its hue 273°. 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 11.26:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.86:1 |
| White text | 11.26:1 |
Values
| HEX | #353A4D |
| RGB | rgb(53, 58, 77) |
| HSL | hsl(228, 18%, 25%) |
| OKLCH | oklch(35.2% 0.034 273.1) |
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 #353A4D | 11.26:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #353A4D | 1.86:1 | Fails | Lc 7.9 | Not readable |
| #353A4D text on white | 11.26:1 | AAA | Lc 96.0 | Preferred for body text |
| #353A4D text on black | 1.86:1 | 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
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D6D9E3
oklch(88.6% 0.014 272.7)
-
Step 300
300
#BBC0D2
oklch(80.9% 0.026 273.4)
-
Step 400
400
#989FBB
oklch(70.6% 0.042 274.2)
-
Step 500
500
#7F88AA
oklch(63.2% 0.052 273.3)
-
Step 600
600
#687195
oklch(55.5% 0.057 273.5)
-
Step 700
700
#575F7F
oklch(49.1% 0.052 273.5)
-
Step 800
800
#474E67
oklch(42.8% 0.043 272.4)
-
Step 900
900 (this color)
#353A4D
oklch(35.2% 0.034 273.1)
-
Step 950
950
#232631
oklch(27% 0.021 273)
#353A4D 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) | #343C4E | 0.006 |
| Deuteranopia (no green cones) | #333A4D | 0.003 |
| Tritanopia (no blue cones) | #2F3E40 | 0.032 |
| Achromatopsia (no color) | #3B3B3B | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353A4D
#353A4D
oklch(35.2% 0.034 273.1)
- #413B26
#413B26
oklch(35.2% 0.035 94.1)
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 #353A4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.030
- Charcoal Grey #3C4142 ΔE 0.037
- Gunmetal #293241 ΔE 0.037
- Charcoal #264653 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.047
Use #353A4D 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.