#455F59
Closest named color: Dark Green Blue (#1F6357). oklch(46.3% 0.033 179), rgb(69, 95, 89).
Aa
White text reads best on this color (6.92:1).
About this color
#455F59 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.033 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.039 away. White text reads best on it, at 6.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #455F59 |
| RGB | rgb(69, 95, 89) |
| HSL | hsl(166, 16%, 32%) |
| OKLCH | oklch(46.3% 0.033 179) |
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 #455F59 | 6.92:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #455F59 | 3.03:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #455F59 text on white | 6.92:1 | AA | Lc 83.9 | Fine for body text |
| #455F59 text on black | 3.03:1 | AA large text | Lc -18.0 | 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 700.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBEA
oklch(93.7% 0.004 179.7)
-
Step 200
200
#D3DBD9
oklch(88.5% 0.009 179.6)
-
Step 300
300
#B6C4C1
oklch(80.9% 0.016 181.7)
-
Step 400
400
#91A6A1
oklch(70.7% 0.025 179.6)
-
Step 500
500
#75908A
oklch(63.1% 0.032 180.2)
-
Step 600
600
#5D7A74
oklch(55.5% 0.035 180.9)
-
Step 700
700 (this color)
#455F59
oklch(46.3% 0.033 179)
-
Step 800
800
#3F544F
oklch(42.7% 0.027 178.7)
-
Step 900
900
#364542
oklch(37.6% 0.02 181.7)
-
Step 950
950
#202926
oklch(27.1% 0.014 173)
#455F59 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) | #5D5C59 | 0.035 |
| Deuteranopia (no green cones) | #585859 | 0.033 |
| Tritanopia (no blue cones) | #3E605D | 0.009 |
| Achromatopsia (no color) | #5A5A5A | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455F59
#455F59
oklch(46.3% 0.033 179)
- #695158
#695158
oklch(46.2% 0.034 359.2)
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 #455F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.039
- Slate #516572 ΔE 0.045
- Dark Aqua #05696B ΔE 0.050
- Petrol #005F6A ΔE 0.054
- YInMn Blue #415A77 ΔE 0.057
- Dark Slate Gray #2F4F4F ΔE 0.061
- Dusty Grape #545775 ΔE 0.064
- Dim Gray #696969 ΔE 0.067
Use #455F59 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.