#455D91
Closest named color: Dusky Blue (#475F94). oklch(48.3% 0.089 264.5), rgb(69, 93, 145).
Aa
White text reads best on this color (6.50:1).
About this color
#455D91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.089 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.008 away. White text reads best on it, at 6.50:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #455D91 |
| RGB | rgb(69, 93, 145) |
| HSL | hsl(221, 36%, 42%) |
| OKLCH | oklch(48.3% 0.089 264.5) |
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 #455D91 | 6.50:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #455D91 | 3.22:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #455D91 text on white | 6.50:1 | AA | Lc 82.2 | Fine for body text |
| #455D91 text on black | 3.22:1 | AA large text | Lc -19.7 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B3C1DD
oklch(80.9% 0.043 264.3)
-
Step 400
400
#8BA1CC
oklch(70.8% 0.068 263.6)
-
Step 500
500
#6F89BF
oklch(63.2% 0.087 264.3)
-
Step 600
600
#5772AC
oklch(55.7% 0.096 264.5)
-
Step 700
700 (this color)
#455D91
oklch(48.3% 0.089 264.5)
-
Step 800
800
#3B4E78
oklch(42.8% 0.074 264.9)
-
Step 900
900
#324160
oklch(37.7% 0.057 264.1)
-
Step 950
950
#1D2638
oklch(26.9% 0.036 263.7)
#455D91 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) | #496293 | 0.016 |
| Deuteranopia (no green cones) | #405B90 | 0.009 |
| Tritanopia (no blue cones) | #226870 | 0.079 |
| Achromatopsia (no color) | #5E5E5E | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455D91
#455D91
oklch(48.3% 0.089 264.5)
- #765A17
#765A17
oklch(48.4% 0.089 84.6)
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 #455D91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.008
- Denim Blue #3B5B92 ΔE 0.014
- Denim #3B638C ΔE 0.023
- Light Navy Blue #2E5A88 ΔE 0.032
- Dusk #4E5481 ΔE 0.033
- Twilight #4E518B ΔE 0.034
- YInMn Blue #415A77 ΔE 0.043
- Dusty Grape #545775 ΔE 0.047
Use #455D91 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.