#455D99
Closest named color: Dusky Blue (#475F94). oklch(48.8% 0.101 266.3), rgb(69, 93, 153).
Aa
White text reads best on this color (6.40:1).
About this color
#455D99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.101 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.011 away. White text reads best on it, at 6.40:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.27:1 |
| White text | 6.40:1 |
Values
| HEX | #455D99 |
| RGB | rgb(69, 93, 153) |
| HSL | hsl(223, 38%, 44%) |
| OKLCH | oklch(48.8% 0.101 266.3) |
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 #455D99 | 6.40:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #455D99 | 3.27:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #455D99 text on white | 6.40:1 | AA | Lc 81.7 | Fine for body text |
| #455D99 text on black | 3.27:1 | AA large text | Lc -20.2 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D1D9EC
oklch(88.5% 0.028 267.5)
-
Step 300
300
#B2C1E1
oklch(81% 0.048 265.4)
-
Step 400
400
#8AA0D2
oklch(70.7% 0.078 266)
-
Step 500
500
#6D88C6
oklch(63.2% 0.099 265.7)
-
Step 600
600
#5670B3
oklch(55.5% 0.109 266.8)
-
Step 700
700 (this color)
#455D99
oklch(48.8% 0.101 266.3)
-
Step 800
800
#394D7D
oklch(42.7% 0.084 265.8)
-
Step 900
900
#314064
oklch(37.6% 0.065 266.1)
-
Step 950
950
#1D263B
oklch(27.1% 0.041 266)
#455D99 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) | #45639B | 0.017 |
| Deuteranopia (no green cones) | #3B5B98 | 0.014 |
| Tritanopia (no blue cones) | #186A73 | 0.091 |
| Achromatopsia (no color) | #5F5F5F | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455D99
#455D99
oklch(48.8% 0.101 266.3)
- #795B00
#795B00
oklch(48.9% 0.1 86.2)
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 #455D99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.011
- Denim Blue #3B5B92 ΔE 0.018
- Denim #3B638C ΔE 0.032
- Twilight #4E518B ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.040
- Dusk #4E5481 ΔE 0.042
- French Blue #436BAD ΔE 0.046
- Dusk Blue #26538D ΔE 0.051
Use #455D99 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.