#5557CB
Closest named color: Iris (#6258C4). oklch(52.1% 0.176 277.6), rgb(85, 87, 203).
Aa
White text reads best on this color (5.81:1).
About this color
#5557CB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.176 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.023 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #5557CB |
| RGB | rgb(85, 87, 203) |
| HSL | hsl(239, 53%, 56%) |
| OKLCH | oklch(52.1% 0.176 277.6) |
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 #5557CB | 5.81:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #5557CB | 3.61:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #5557CB text on white | 5.81:1 | AA | Lc 78.7 | Fine for body text |
| #5557CB text on black | 3.61:1 | AA large text | Lc -23.1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B3BCF8
oklch(80.9% 0.085 277.7)
-
Step 400
400
#8D97F4
oklch(70.7% 0.136 277.7)
-
Step 500
500
#737AF0
oklch(63.2% 0.174 277.6)
-
Step 600
600
#5D5FDE
oklch(55.5% 0.189 277.6)
-
Step 700
700 (this color)
#5557CB
oklch(52.1% 0.176 277.6)
-
Step 800
800
#3F419C
oklch(42.8% 0.145 277.4)
-
Step 900
900
#35387C
oklch(37.7% 0.113 277.6)
-
Step 950
950
#1F2149
oklch(27% 0.073 278.2)
#5557CB 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) | #006ACF | 0.070 |
| Deuteranopia (no green cones) | #0060C9 | 0.065 |
| Tritanopia (no blue cones) | #007288 | 0.153 |
| Achromatopsia (no color) | #656565 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5557CB
#5557CB
oklch(52.1% 0.176 277.6)
- #7A6900
#7A6900
oklch(52.1% 0.108 98)
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 #5557CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.023
- Warm Blue #4B57DB ΔE 0.028
- Slate Blue #6A5ACD ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.034
- Light Indigo #6D5ACF ΔE 0.038
- Bluey Purple #6241C7 ΔE 0.049
- Royal Blue #4169E1 ΔE 0.054
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
Use #5557CB 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.