#555CAE
Closest named color: Iris (#6258C4). oklch(51% 0.129 277.1), rgb(85, 92, 174).
Aa
White text reads best on this color (5.95:1).
About this color
#555CAE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.129 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.042 away. White text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #555CAE |
| RGB | rgb(85, 92, 174) |
| HSL | hsl(235, 35%, 51%) |
| OKLCH | oklch(51% 0.129 277.1) |
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 #555CAE | 5.95:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #555CAE | 3.52:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #555CAE text on white | 5.95:1 | AA | Lc 79.6 | Fine for body text |
| #555CAE text on black | 3.52:1 | AA large text | Lc -22.2 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D3D8F0
oklch(88.6% 0.033 276.3)
-
Step 300
300
#B6BEE9
oklch(81% 0.061 276.7)
-
Step 400
400
#919BDE
oklch(70.7% 0.099 277)
-
Step 500
500
#7781D5
oklch(63.2% 0.126 277)
-
Step 600
600
#6168C2
oklch(55.5% 0.138 277.5)
-
Step 700
700 (this color)
#555CAE
oklch(51% 0.129 277.1)
-
Step 800
800
#414788
oklch(42.6% 0.107 276.9)
-
Step 900
900
#373C6D
oklch(37.7% 0.083 277.2)
-
Step 950
950
#202340
oklch(26.9% 0.054 277.6)
#555CAE 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) | #3867B1 | 0.041 |
| Deuteranopia (no green cones) | #2F60AC | 0.044 |
| Tritanopia (no blue cones) | #316E7C | 0.114 |
| Achromatopsia (no color) | #646464 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555CAE
#555CAE
oklch(51% 0.129 277.1)
- #776500
#776500
oklch(50.9% 0.105 96.9)
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 #555CAE, closest first.
No curated palette has a color within ΔE 0.04 of #555CAE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.042
- French Blue #436BAD ΔE 0.044
- Dusky Blue #475F94 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.058
- Slate Blue #6A5ACD ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.061
- Twilight #4E518B ΔE 0.061
Use #555CAE 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.