#353E66
Closest named color: Dark Grey Blue (#29465B). oklch(37.5% 0.07 273), rgb(53, 62, 102).
Aa
White text reads best on this color (10.33:1).
About this color
#353E66 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.070 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 10.33:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.33:1 |
Values
| HEX | #353E66 |
| RGB | rgb(53, 62, 102) |
| HSL | hsl(229, 32%, 30%) |
| OKLCH | oklch(37.5% 0.07 273) |
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 #353E66 | 10.33:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #353E66 | 2.03:1 | Fails | Lc 10.0 | Not readable |
| #353E66 text on white | 10.33:1 | AAA | Lc 93.9 | Preferred for body text |
| #353E66 text on black | 2.03:1 | Fails | Lc -8.6 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D2D8ED
oklch(88.4% 0.03 273.1)
-
Step 300
300
#B5BFE3
oklch(80.9% 0.052 273)
-
Step 400
400
#8F9DD5
oklch(70.6% 0.084 273.3)
-
Step 500
500
#7484CA
oklch(63% 0.107 273.2)
-
Step 600
600
#5D6DB7
oklch(55.6% 0.116 272.9)
-
Step 700
700
#4D5B9D
oklch(49.1% 0.107 272.9)
-
Step 800
800
#3F4A80
oklch(42.6% 0.091 273.3)
-
Step 900
900 (this color)
#353E66
oklch(37.5% 0.07 273)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#353E66 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) | #2F4268 | 0.013 |
| Deuteranopia (no green cones) | #2B3E65 | 0.014 |
| Tritanopia (no blue cones) | #24464D | 0.061 |
| Achromatopsia (no color) | #404040 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353E66
#353E66
oklch(37.5% 0.07 273)
- #4E400C
#4E400C
oklch(37.6% 0.07 93.1)
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 #353E66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Twilight Blue #0A437A ΔE 0.050
- Charcoal #264653 ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.055
- Marine Blue #01386A ΔE 0.057
- Onyx #343A40 ΔE 0.065
- Charcoal Grey #3C4142 ΔE 0.067
Use #353E66 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.