#353E88
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.123 274.2), rgb(53, 62, 136).
Aa
White text reads best on this color (9.56:1).
About this color
#353E88 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.123 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.030 away. White text reads best on it, at 9.56:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.56:1 |
Values
| HEX | #353E88 |
| RGB | rgb(53, 62, 136) |
| HSL | hsl(233, 44%, 37%) |
| OKLCH | oklch(39.9% 0.123 274.2) |
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 #353E88 | 9.56:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #353E88 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #353E88 text on white | 9.56:1 | AAA | Lc 91.9 | Preferred for body text |
| #353E88 text on black | 2.19:1 | Fails | Lc -10.5 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED7FC
oklch(88.4% 0.052 274.5)
-
Step 300
300
#AEBDFC
oklch(81% 0.091 273.9)
-
Step 400
400
#8597FB
oklch(70.6% 0.147 274.3)
-
Step 500
500
#6A7AF9
oklch(63.2% 0.188 274.3)
-
Step 600
600
#545FE8
oklch(55.7% 0.204 274.2)
-
Step 700
700
#454DCA
oklch(49.1% 0.191 274.2)
-
Step 800
800
#3840A3
oklch(42.7% 0.158 274.1)
-
Step 900
900 (this color)
#353E88
oklch(39.9% 0.123 274.2)
-
Step 950
950
#1C214C
oklch(27% 0.079 274.8)
#353E88 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) | #11498B | 0.041 |
| Deuteranopia (no green cones) | #004286 | 0.044 |
| Tritanopia (no blue cones) | #004F5D | 0.106 |
| Achromatopsia (no color) | #454545 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353E88
#353E88
oklch(39.9% 0.123 274.2)
- #564600
#564600
oklch(39.9% 0.082 94)
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 #353E88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.030
- Cobalt #1E488F ΔE 0.034
- Blueberry #464196 ΔE 0.036
- Twilight Blue #0A437A ΔE 0.049
- Light Navy #155084 ΔE 0.056
- Dusk Blue #26538D ΔE 0.058
- Sapphire #2138AB ΔE 0.065
- Twilight #4E518B ΔE 0.068
Use #353E88 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.