#353F4E
Closest named color: Onyx (#343A40). oklch(36.5% 0.029 258.4), rgb(53, 63, 78).
Aa
White text reads best on this color (10.64:1).
About this color
#353F4E is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.026 away. White text reads best on it, at 10.64:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.97:1 |
| White text | 10.64:1 |
Values
| HEX | #353F4E |
| RGB | rgb(53, 63, 78) |
| HSL | hsl(216, 19%, 26%) |
| OKLCH | oklch(36.5% 0.029 258.4) |
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 #353F4E | 10.64:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #353F4E | 1.97:1 | Fails | Lc 9.2 | Not readable |
| #353F4E text on white | 10.64:1 | AAA | Lc 94.7 | Preferred for body text |
| #353F4E text on black | 1.97:1 | Fails | Lc -7.9 | 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
#D4D9E1
oklch(88.4% 0.012 259.8)
-
Step 300
300
#B8C1CF
oklch(80.8% 0.022 259.2)
-
Step 400
400
#93A2B7
oklch(70.7% 0.035 256.8)
-
Step 500
500
#798BA5
oklch(63.2% 0.045 257.5)
-
Step 600
600
#627490
oklch(55.5% 0.049 259.1)
-
Step 700
700
#51627B
oklch(49.2% 0.045 257.9)
-
Step 800
800
#425064
oklch(42.7% 0.038 257.3)
-
Step 900
900 (this color)
#353F4E
oklch(36.5% 0.029 258.4)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#353F4E 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) | #3A404F | 0.009 |
| Deuteranopia (no green cones) | #373D4E | 0.007 |
| Tritanopia (no blue cones) | #2E4244 | 0.025 |
| Achromatopsia (no color) | #3E3E3E | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #353F4E
#353F4E
oklch(36.5% 0.029 258.4)
- #473D2D
#473D2D
oklch(36.6% 0.029 79.3)
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 #353F4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.026
- Charcoal #264653 ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.034
- Gunmetal #293241 ΔE 0.050
- Midnight Green #073B4C ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.052
Use #353F4E 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.