#45555B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.8% 0.022 222.6), rgb(69, 85, 91).
Aa
White text reads best on this color (7.76:1).
About this color
#45555B 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 0.041 away. White text reads best on it, at 7.76:1.
| Hue family | Neutrals |
| Lightness | dark (44%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #45555B |
| RGB | rgb(69, 85, 91) |
| HSL | hsl(196, 14%, 31%) |
| OKLCH | oklch(43.8% 0.022 222.6) |
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 #45555B | 7.76:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #45555B | 2.70:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #45555B text on white | 7.76:1 | AAA | Lc 87.0 | Fine for body text |
| #45555B text on black | 2.70:1 | Fails | Lc -15.1 | 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
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D4DADC
oklch(88.4% 0.007 219.6)
-
Step 300
300
#B8C3C7
oklch(81% 0.013 221.5)
-
Step 400
400
#93A4AA
oklch(70.7% 0.021 221)
-
Step 500
500
#798D95
oklch(63% 0.026 223.9)
-
Step 600
600
#617780
oklch(55.5% 0.029 224.6)
-
Step 700
700
#50646C
oklch(49% 0.027 224.2)
-
Step 800
800 (this color)
#45555B
oklch(43.8% 0.022 222.6)
-
Step 900
900
#384448
oklch(37.7% 0.017 220)
-
Step 950
950
#21282A
oklch(27.1% 0.011 216.9)
#45555B 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) | #51545B | 0.018 |
| Deuteranopia (no green cones) | #4E515B | 0.017 |
| Tritanopia (no blue cones) | #3F5757 | 0.014 |
| Achromatopsia (no color) | #525252 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #45555B
#45555B
oklch(43.8% 0.022 222.6)
- #5D4E48
#5D4E48
oklch(43.7% 0.022 43)
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 #45555B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.041
- YInMn Blue #415A77 ΔE 0.044
- Dusty Grape #545775 ΔE 0.050
- Petrol #005F6A ΔE 0.055
- Deep Teal #00555A ΔE 0.057
- Slate #516572 ΔE 0.058
- Dark Green Blue #1F6357 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.065
Use #45555B 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.