#434E5B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.9% 0.026 252.7), rgb(67, 78, 91).
Aa
White text reads best on this color (8.46:1).
About this color
#434E5B is a dark close to neutral grey. In OKLCH its lightness is 42%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.036 away. White text reads best on it, at 8.46:1.
| Hue family | Neutrals |
| Lightness | dark (42%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.47:1 |
| White text | 8.46:1 |
Values
| HEX | #434E5B |
| RGB | rgb(67, 78, 91) |
| HSL | hsl(213, 15%, 31%) |
| OKLCH | oklch(41.9% 0.026 252.7) |
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 #434E5B | 8.46:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #434E5B | 2.47:1 | Fails | Lc 14.8 | Not readable |
| #434E5B text on white | 8.46:1 | AAA | Lc 89.2 | Fine for body text |
| #434E5B text on black | 2.47:1 | Fails | Lc -13.0 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D5D9DF
oklch(88.4% 0.009 258.3)
-
Step 300
300
#BAC1CA
oklch(80.8% 0.015 254.6)
-
Step 400
400
#96A2B0
oklch(70.7% 0.025 252.2)
-
Step 500
500
#7C8B9C
oklch(63.1% 0.031 251.6)
-
Step 600
600
#667587
oklch(55.7% 0.033 253.1)
-
Step 700
700
#546272
oklch(49% 0.031 251.9)
-
Step 800
800 (this color)
#434E5B
oklch(41.9% 0.026 252.7)
-
Step 900
900
#3A424C
oklch(37.6% 0.02 254.1)
-
Step 950
950
#22272D
oklch(27% 0.013 253)
#434E5B 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) | #494E5C | 0.009 |
| Deuteranopia (no green cones) | #474C5B | 0.008 |
| Tritanopia (no blue cones) | #3C5152 | 0.023 |
| Achromatopsia (no color) | #4D4D4D | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434E5B
#434E5B
oklch(41.9% 0.026 252.7)
- #564B3D
#564B3D
oklch(42% 0.027 73.7)
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 #434E5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.046
- Charcoal #264653 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.053
- Dusty Grape #545775 ΔE 0.055
- Deep Teal #00555A ΔE 0.058
- Petrol #005F6A ΔE 0.066
Use #434E5B 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.