#455757
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.2% 0.022 196.4), rgb(69, 87, 87).
Aa
White text reads best on this color (7.62:1).
About this color
#455757 is a dark close to neutral grey. In OKLCH its lightness is 44%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.042 away. White text reads best on it, at 7.62:1.
| Hue family | Neutrals |
| Lightness | dark (44%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #455757 |
| RGB | rgb(69, 87, 87) |
| HSL | hsl(180, 12%, 31%) |
| OKLCH | oklch(44.2% 0.022 196.4) |
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 #455757 | 7.62:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #455757 | 2.75:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #455757 text on white | 7.62:1 | AAA | Lc 86.5 | Fine for body text |
| #455757 text on black | 2.75:1 | Fails | Lc -15.6 | Dividers and decoration only |
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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D4DBDB
oklch(88.6% 0.008 197)
-
Step 300
300
#B8C3C3
oklch(80.9% 0.012 196.9)
-
Step 400
400
#92A5A5
oklch(70.7% 0.021 196.7)
-
Step 500
500
#778F8F
oklch(63.1% 0.027 196.5)
-
Step 600
600
#607979
oklch(55.6% 0.029 196.3)
-
Step 700
700
#4F6666
oklch(49.2% 0.027 196.3)
-
Step 800
800 (this color)
#455757
oklch(44.2% 0.022 196.4)
-
Step 900
900
#374545
oklch(37.8% 0.018 196.4)
-
Step 950
950
#202828
oklch(26.9% 0.011 196.5)
#455757 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) | #555557 | 0.024 |
| Deuteranopia (no green cones) | #515257 | 0.023 |
| Tritanopia (no blue cones) | #3F5857 | 0.008 |
| Achromatopsia (no color) | #545454 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455757
#455757
oklch(44.2% 0.022 196.4)
- #5F4E4F
#5F4E4F
oklch(44.2% 0.023 14.1)
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 #455757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.051
- Petrol #005F6A ΔE 0.055
- Dusty Grape #545775 ΔE 0.057
- Slate #516572 ΔE 0.057
- Deep Teal #00555A ΔE 0.058
- Dark Aqua #05696B ΔE 0.065
Use #455757 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.