#353D4D
Closest named color: Onyx (#343A40). oklch(35.9% 0.03 264.1), rgb(53, 61, 77).
Aa
White text reads best on this color (10.90:1).
About this color
#353D4D is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.023 away. White text reads best on it, at 10.90:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #353D4D |
| RGB | rgb(53, 61, 77) |
| HSL | hsl(220, 18%, 25%) |
| OKLCH | oklch(35.9% 0.03 264.1) |
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 #353D4D | 10.90:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #353D4D | 1.92:1 | Fails | Lc 8.6 | Not readable |
| #353D4D text on white | 10.90:1 | AAA | Lc 95.3 | Preferred for body text |
| #353D4D text on black | 1.92:1 | Fails | Lc -7.4 | 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
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E2
oklch(88.5% 0.013 266.7)
-
Step 300
300
#B9C1D0
oklch(80.9% 0.023 263.2)
-
Step 400
400
#95A1B8
oklch(70.7% 0.036 263.5)
-
Step 500
500
#7B8AA6
oklch(63.1% 0.046 262.9)
-
Step 600
600
#657391
oklch(55.5% 0.05 265.3)
-
Step 700
700
#53617C
oklch(49.2% 0.047 263.3)
-
Step 800
800
#444F64
oklch(42.7% 0.038 263.2)
-
Step 900
900 (this color)
#353D4D
oklch(35.9% 0.03 264.1)
-
Step 950
950
#222630
oklch(26.9% 0.02 267.9)
#353D4D 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) | #383E4E | 0.006 |
| Deuteranopia (no green cones) | #363C4D | 0.003 |
| Tritanopia (no blue cones) | #2E4042 | 0.027 |
| Achromatopsia (no color) | #3D3D3D | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353D4D
#353D4D
oklch(35.9% 0.03 264.1)
- #443C2B
#443C2B
oklch(35.9% 0.03 85.6)
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 #353D4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.031
- Charcoal #264653 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.033
- Gunmetal #293241 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.050
- Midnight Green #073B4C ΔE 0.050
Use #353D4D 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.