#455C66
Closest named color: YInMn Blue (#415A77). oklch(46% 0.032 226.4), rgb(69, 92, 102).
Aa
White text reads best on this color (7.05:1).
About this color
#455C66 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.032 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.031 away. White text reads best on it, at 7.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #455C66 |
| RGB | rgb(69, 92, 102) |
| HSL | hsl(198, 19%, 34%) |
| OKLCH | oklch(46% 0.032 226.4) |
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 #455C66 | 7.05:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #455C66 | 2.97:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #455C66 text on white | 7.05:1 | AAA | Lc 84.4 | Fine for body text |
| #455C66 text on black | 2.97:1 | Fails | Lc -17.5 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D3DADD
oklch(88.4% 0.009 225.1)
-
Step 300
300
#B7C3C8
oklch(80.9% 0.015 224.5)
-
Step 400
400
#91A4AD
oklch(70.7% 0.025 227.9)
-
Step 500
500
#768E98
oklch(63.1% 0.031 225)
-
Step 600
600
#5E7883
oklch(55.6% 0.035 225.6)
-
Step 700
700 (this color)
#455C66
oklch(46% 0.032 226.4)
-
Step 800
800
#40525A
oklch(42.6% 0.026 226.8)
-
Step 900
900
#36444A
oklch(37.7% 0.021 225.8)
-
Step 950
950
#20282B
oklch(27% 0.013 222.5)
#455C66 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) | #575B67 | 0.026 |
| Deuteranopia (no green cones) | #525766 | 0.023 |
| Tritanopia (no blue cones) | #3A5F5F | 0.022 |
| Achromatopsia (no color) | #595959 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455C66
#455C66
oklch(46% 0.032 226.4)
- #685349
#685349
oklch(46.1% 0.032 46.8)
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 #455C66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.031
- Slate #516572 ΔE 0.036
- Dusty Grape #545775 ΔE 0.040
- Petrol #005F6A ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.054
- Dark Aqua #05696B ΔE 0.055
- Dusk #4E5481 ΔE 0.059
- Denim #3B638C ΔE 0.060
Use #455C66 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.