#353F63
Closest named color: Dark Grey Blue (#29465B). oklch(37.6% 0.063 271.3), rgb(53, 63, 99).
Aa
White text reads best on this color (10.28:1).
About this color
#353F63 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.063 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.032 away. White text reads best on it, at 10.28:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.28:1 |
Values
| HEX | #353F63 |
| RGB | rgb(53, 63, 99) |
| HSL | hsl(227, 30%, 30%) |
| OKLCH | oklch(37.6% 0.063 271.3) |
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 #353F63 | 10.28:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #353F63 | 2.04:1 | Fails | Lc 10.1 | Not readable |
| #353F63 text on white | 10.28:1 | AAA | Lc 93.8 | Preferred for body text |
| #353F63 text on black | 2.04:1 | Fails | Lc -8.7 | 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
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EB
oklch(88.5% 0.026 268.8)
-
Step 300
300
#B5C0E0
oklch(81% 0.047 270.4)
-
Step 400
400
#8F9ED1
oklch(70.6% 0.077 271.6)
-
Step 500
500
#7486C5
oklch(63.2% 0.097 271.2)
-
Step 600
600
#5D6FB1
oklch(55.7% 0.105 271.1)
-
Step 700
700
#4D5C98
oklch(49% 0.098 271.8)
-
Step 800
800
#3F4C7B
oklch(42.8% 0.08 271)
-
Step 900
900 (this color)
#353F63
oklch(37.6% 0.063 271.3)
-
Step 950
950
#1F253A
oklch(26.9% 0.04 271.3)
#353F63 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) | #324364 | 0.012 |
| Deuteranopia (no green cones) | #2E3F62 | 0.010 |
| Tritanopia (no blue cones) | #25464C | 0.056 |
| Achromatopsia (no color) | #414141 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353F63
#353F63
oklch(37.6% 0.063 271.3)
- #4E4014
#4E4014
oklch(37.7% 0.064 91.2)
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 #353F63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal #264653 ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Twilight Blue #0A437A ΔE 0.053
- Marine Blue #01386A ΔE 0.059
- Onyx #343A40 ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.060
Use #353F63 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.