#353F8C
Closest named color: Dark Slate Blue (#483D8B). oklch(40.4% 0.127 273.7), rgb(53, 63, 140).
Aa
White text reads best on this color (9.37:1).
About this color
#353F8C is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.127 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 9.37:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.37:1 |
Values
| HEX | #353F8C |
| RGB | rgb(53, 63, 140) |
| HSL | hsl(233, 45%, 38%) |
| OKLCH | oklch(40.4% 0.127 273.7) |
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 #353F8C | 9.37:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #353F8C | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #353F8C text on white | 9.37:1 | AAA | Lc 91.4 | Preferred for body text |
| #353F8C text on black | 2.24:1 | Fails | Lc -11.0 | 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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F5
oklch(88.5% 0.041 273.3)
-
Step 300
300
#B1BEF1
oklch(80.9% 0.074 273.5)
-
Step 400
400
#899BEB
oklch(70.8% 0.119 273.4)
-
Step 500
500
#6E7FE4
oklch(63% 0.152 274)
-
Step 600
600
#5766D2
oklch(55.5% 0.165 273.8)
-
Step 700
700
#4854B6
oklch(49% 0.154 274)
-
Step 800
800 (this color)
#353F8C
oklch(40.4% 0.127 273.7)
-
Step 900
900
#323B75
oklch(37.6% 0.099 274)
-
Step 950
950
#1D2345
oklch(27% 0.063 273.9)
#353F8C 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) | #0D4A8F | 0.042 |
| Deuteranopia (no green cones) | #00438A | 0.043 |
| Tritanopia (no blue cones) | #00515F | 0.110 |
| Achromatopsia (no color) | #464646 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353F8C
#353F8C
oklch(40.4% 0.127 273.7)
- #584700
#584700
oklch(40.4% 0.083 93.2)
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 #353F8C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Cobalt #1E488F ΔE 0.031
- Blueberry #464196 ΔE 0.031
- Twilight Blue #0A437A ΔE 0.052
- Dusk Blue #26538D ΔE 0.055
- Light Navy #155084 ΔE 0.056
- Sapphire #2138AB ΔE 0.059
- Twilight #4E518B ΔE 0.066
Use #353F8C 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.