#353E4B
Closest named color: Onyx (#343A40). oklch(36.1% 0.026 257.5), rgb(53, 62, 75).
Aa
White text reads best on this color (10.81:1).
About this color
#353E4B is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.020 away. White text reads best on it, at 10.81:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.94:1 |
| White text | 10.81:1 |
Values
| HEX | #353E4B |
| RGB | rgb(53, 62, 75) |
| HSL | hsl(215, 17%, 25%) |
| OKLCH | oklch(36.1% 0.026 257.5) |
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 #353E4B | 10.81:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #353E4B | 1.94:1 | Fails | Lc 8.8 | Not readable |
| #353E4B text on white | 10.81:1 | AAA | Lc 95.1 | Preferred for body text |
| #353E4B text on black | 1.94:1 | Fails | Lc -7.6 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#B9C1CD
oklch(80.8% 0.019 258.4)
-
Step 400
400
#95A2B4
oklch(70.8% 0.03 256.5)
-
Step 500
500
#7B8BA2
oklch(63.2% 0.039 257.4)
-
Step 600
600
#64748D
oklch(55.5% 0.044 259.2)
-
Step 700
700
#536277
oklch(49.2% 0.039 256.8)
-
Step 800
800
#445061
oklch(42.8% 0.032 257.1)
-
Step 900
900 (this color)
#353E4B
oklch(36.1% 0.026 257.5)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#353E4B 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) | #3A3E4C | 0.008 |
| Deuteranopia (no green cones) | #373C4B | 0.007 |
| Tritanopia (no blue cones) | #2F4142 | 0.023 |
| Achromatopsia (no color) | #3D3D3D | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353E4B
#353E4B
oklch(36.1% 0.026 257.5)
- #453C2E
#453C2E
oklch(36.1% 0.026 78.7)
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 #353E4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.020
- Charcoal Grey #3C4142 ΔE 0.024
- Charcoal #264653 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.033
- Gunmetal #293241 ΔE 0.046
- Midnight Green #073B4C ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.054
Use #353E4B 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.