#455FB9
Closest named color: Mid Blue (#276AB3). oklch(51.3% 0.145 268.8), rgb(69, 95, 185).
Aa
White text reads best on this color (5.84:1).
About this color
#455FB9 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.145 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.039 away. White text reads best on it, at 5.84:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.59:1 |
| White text | 5.84:1 |
Values
| HEX | #455FB9 |
| RGB | rgb(69, 95, 185) |
| HSL | hsl(227, 46%, 50%) |
| OKLCH | oklch(51.3% 0.145 268.8) |
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 #455FB9 | 5.84:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #455FB9 | 3.59:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #455FB9 text on white | 5.84:1 | AA | Lc 79.0 | Fine for body text |
| #455FB9 text on black | 3.59:1 | AA large text | Lc -22.8 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#AEBFEF
oklch(80.8% 0.071 269.6)
-
Step 400
400
#849DE7
oklch(70.7% 0.112 269.2)
-
Step 500
500
#6683E0
oklch(63.1% 0.144 269)
-
Step 600
600
#4E6BCD
oklch(55.6% 0.155 268.6)
-
Step 700
700 (this color)
#455FB9
oklch(51.3% 0.145 268.8)
-
Step 800
800
#344990
oklch(42.8% 0.12 268.6)
-
Step 900
900
#2D3E73
oklch(37.8% 0.093 268.3)
-
Step 950
950
#1A2443
oklch(26.9% 0.06 268.7)
#455FB9 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) | #306ABC | 0.032 |
| Deuteranopia (no green cones) | #1960B7 | 0.037 |
| Tritanopia (no blue cones) | #007483 | 0.124 |
| Achromatopsia (no color) | #656565 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455FB9
#455FB9
oklch(51.3% 0.145 268.8)
- #7F6300
#7F6300
oklch(51.3% 0.105 89.2)
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 #455FB9, closest first.
No curated palette has a color within ΔE 0.04 of #455FB9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.039
- French Blue #436BAD ΔE 0.041
- Iris #6258C4 ΔE 0.046
- Warm Blue #4B57DB ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.064
Use #455FB9 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.