#455571
Closest named color: YInMn Blue (#415A77). oklch(44.8% 0.05 261.4), rgb(69, 85, 113).
Aa
White text reads best on this color (7.52:1).
About this color
#455571 is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.050 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.016 away. White text reads best on it, at 7.52:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.79:1 |
| White text | 7.52:1 |
Values
| HEX | #455571 |
| RGB | rgb(69, 85, 113) |
| HSL | hsl(218, 24%, 36%) |
| OKLCH | oklch(44.8% 0.05 261.4) |
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 #455571 | 7.52:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #455571 | 2.79:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #455571 text on white | 7.52:1 | AAA | Lc 86.1 | Fine for body text |
| #455571 text on black | 2.79:1 | Fails | Lc -15.9 | 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 800.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E4
oklch(88.4% 0.016 262.7)
-
Step 300
300
#B6C1D4
oklch(80.8% 0.029 261.5)
-
Step 400
400
#90A1BF
oklch(70.6% 0.048 261.8)
-
Step 500
500
#758AAF
oklch(63.1% 0.061 261.6)
-
Step 600
600
#5E749A
oklch(55.7% 0.065 261.1)
-
Step 700
700
#4D6184
oklch(49.1% 0.062 261.3)
-
Step 800
800 (this color)
#455571
oklch(44.8% 0.05 261.4)
-
Step 900
900
#364257
oklch(37.7% 0.039 261.5)
-
Step 950
950
#202733
oklch(27.1% 0.025 261.1)
#455571 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) | #4B5772 | 0.011 |
| Deuteranopia (no green cones) | #475370 | 0.006 |
| Tritanopia (no blue cones) | #375B5F | 0.044 |
| Achromatopsia (no color) | #545454 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455571
#455571
oklch(44.8% 0.05 261.4)
- #635234
#635234
oklch(44.8% 0.05 81.1)
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 #455571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.016
- Dusty Grape #545775 ΔE 0.024
- Dusk #4E5481 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.043
- Twilight #4E518B ΔE 0.050
- Denim #3B638C ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.053
- Slate #516572 ΔE 0.054
Use #455571 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.