#455591
Closest named color: Twilight (#4E518B). oklch(46.5% 0.099 270.9), rgb(69, 85, 145).
Aa
White text reads best on this color (7.09:1).
About this color
#455591 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.099 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.017 away. White text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.96:1 |
| White text | 7.09:1 |
Values
| HEX | #455591 |
| RGB | rgb(69, 85, 145) |
| HSL | hsl(227, 36%, 42%) |
| OKLCH | oklch(46.5% 0.099 270.9) |
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 #455591 | 7.09:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #455591 | 2.96:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #455591 text on white | 7.09:1 | AAA | Lc 84.5 | Fine for body text |
| #455591 text on black | 2.96:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EB
oklch(88.5% 0.026 268.8)
-
Step 300
300
#B5C0E1
oklch(81% 0.048 270.8)
-
Step 400
400
#8E9ED1
oklch(70.6% 0.077 270.9)
-
Step 500
500
#7386C5
oklch(63.1% 0.098 270.6)
-
Step 600
600
#5C6FB2
oklch(55.7% 0.107 270.6)
-
Step 700
700 (this color)
#455591
oklch(46.5% 0.099 270.9)
-
Step 800
800
#3E4C7C
oklch(42.8% 0.082 270.3)
-
Step 900
900
#353F64
oklch(37.6% 0.065 271.5)
-
Step 950
950
#1F253A
oklch(26.9% 0.04 271.3)
#455591 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) | #3D5C93 | 0.021 |
| Deuteranopia (no green cones) | #355590 | 0.020 |
| Tritanopia (no blue cones) | #23626C | 0.089 |
| Achromatopsia (no color) | #585858 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455591
#455591
oklch(46.5% 0.099 270.9)
- #6E5700
#6E5700
oklch(46.7% 0.095 90.9)
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 #455591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.017
- Denim Blue #3B5B92 ΔE 0.019
- Dusk #4E5481 ΔE 0.028
- Dusky Blue #475F94 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.034
- Dusk Blue #26538D ΔE 0.037
- Denim #3B638C ΔE 0.044
- YInMn Blue #415A77 ΔE 0.049
Use #455591 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.