#455D78
Closest named color: YInMn Blue (#415A77). oklch(47% 0.053 251.9), rgb(69, 93, 120).
Aa
White text reads best on this color (6.79:1).
About this color
#455D78 is a medium-dark, muted blue. In OKLCH its lightness is 47%, its chroma 0.053 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.011 away. White text reads best on it, at 6.79:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.08:1 |
| White text | 6.79:1 |
Values
| HEX | #455D78 |
| RGB | rgb(69, 93, 120) |
| HSL | hsl(212, 27%, 37%) |
| OKLCH | oklch(47% 0.053 251.9) |
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 #455D78 | 6.79:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #455D78 | 3.08:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #455D78 text on white | 6.79:1 | AA | Lc 83.4 | Fine for body text |
| #455D78 text on black | 3.08:1 | AA large text | Lc -18.5 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B5C2D1
oklch(80.9% 0.026 251.9)
-
Step 400
400
#8FA3BA
oklch(70.8% 0.041 252)
-
Step 500
500
#738CA9
oklch(63.1% 0.052 252.4)
-
Step 600
600
#5B7694
oklch(55.6% 0.057 251.5)
-
Step 700
700 (this color)
#455D78
oklch(47% 0.053 251.9)
-
Step 800
800
#3D5167
oklch(42.8% 0.044 251.3)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#455D78 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) | #535E79 | 0.020 |
| Deuteranopia (no green cones) | #4D5977 | 0.015 |
| Tritanopia (no blue cones) | #336366 | 0.045 |
| Achromatopsia (no color) | #5B5B5B | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455D78
#455D78
oklch(47% 0.053 251.9)
- #6E5639
#6E5639
oklch(47% 0.053 71.2)
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 #455D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.011
- Dusty Grape #545775 ΔE 0.025
- Denim #3B638C ΔE 0.033
- Slate #516572 ΔE 0.034
- Dusk #4E5481 ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.039
- Dusky Blue #475F94 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.046
Use #455D78 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.