#455B71
Closest named color: YInMn Blue (#415A77). oklch(46.2% 0.045 248.8), rgb(69, 91, 113).
Aa
White text reads best on this color (7.02:1).
About this color
#455B71 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.045 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.012 away. White text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.98:1 |
| White text | 7.02:1 |
Values
| HEX | #455B71 |
| RGB | rgb(69, 91, 113) |
| HSL | hsl(210, 24%, 36%) |
| OKLCH | oklch(46.2% 0.045 248.8) |
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 #455B71 | 7.02:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #455B71 | 2.98:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #455B71 text on white | 7.02:1 | AAA | Lc 84.3 | Fine for body text |
| #455B71 text on black | 2.98:1 | Fails | Lc -17.7 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B6C2CE
oklch(80.8% 0.022 248.1)
-
Step 400
400
#90A3B6
oklch(70.7% 0.035 248.3)
-
Step 500
500
#758CA4
oklch(63.1% 0.045 249.6)
-
Step 600
600
#5D768F
oklch(55.6% 0.049 248.7)
-
Step 700
700 (this color)
#455B71
oklch(46.2% 0.045 248.8)
-
Step 800
800
#3F5163
oklch(42.7% 0.038 248.7)
-
Step 900
900
#364351
oklch(37.7% 0.029 250.5)
-
Step 950
950
#20272F
oklch(26.9% 0.018 251.9)
#455B71 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) | #525B72 | 0.018 |
| Deuteranopia (no green cones) | #4D5771 | 0.016 |
| Tritanopia (no blue cones) | #366062 | 0.038 |
| Achromatopsia (no color) | #595959 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455B71
#455B71
oklch(46.2% 0.045 248.8)
- #69543D
#69543D
oklch(46.1% 0.045 68.9)
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 #455B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.012
- Dusty Grape #545775 ΔE 0.026
- Slate #516572 ΔE 0.036
- Dusk #4E5481 ΔE 0.040
- Denim #3B638C ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.045
- Petrol #005F6A ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.055
Use #455B71 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.