#555EA4
Closest named color: Dusky Blue (#475F94). oklch(50.8% 0.111 276.2), rgb(85, 94, 164).
Aa
White text reads best on this color (5.96:1).
About this color
#555EA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.111 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.033 away. White text reads best on it, at 5.96:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.52:1 |
| White text | 5.96:1 |
Values
| HEX | #555EA4 |
| RGB | rgb(85, 94, 164) |
| HSL | hsl(233, 32%, 49%) |
| OKLCH | oklch(50.8% 0.111 276.2) |
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 #555EA4 | 5.96:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #555EA4 | 3.52:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #555EA4 text on white | 5.96:1 | AA | Lc 79.7 | Fine for body text |
| #555EA4 text on black | 3.52:1 | AA large text | Lc -22.1 | 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
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D3D8ED
oklch(88.5% 0.029 275.1)
-
Step 300
300
#B7BEE4
oklch(80.9% 0.054 276.9)
-
Step 400
400
#929CD6
oklch(70.7% 0.086 276.4)
-
Step 500
500
#7883CB
oklch(63.1% 0.109 276.2)
-
Step 600
600
#616BB8
oklch(55.5% 0.119 276.2)
-
Step 700
700 (this color)
#555EA4
oklch(50.8% 0.111 276.2)
-
Step 800
800
#424981
oklch(42.7% 0.093 276.3)
-
Step 900
900
#383E67
oklch(37.8% 0.07 276.2)
-
Step 950
950
#20243C
oklch(26.9% 0.045 275.7)
#555EA4 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) | #4367A7 | 0.031 |
| Deuteranopia (no green cones) | #3C61A2 | 0.031 |
| Tritanopia (no blue cones) | #386D79 | 0.098 |
| Achromatopsia (no color) | #646464 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555EA4
#555EA4
oklch(50.8% 0.111 276.2)
- #776400
#776400
oklch(50.7% 0.104 96)
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 #555EA4, closest first.
No curated palette has a color within ΔE 0.04 of #555EA4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.033
- French Blue #436BAD ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.046
- Twilight #4E518B ΔE 0.051
- Mid Blue #276AB3 ΔE 0.054
- Denim #3B638C ΔE 0.055
- Iris #6258C4 ΔE 0.058
- Dusk #4E5481 ΔE 0.060
Use #555EA4 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.