#5559CC
Closest named color: Iris (#6258C4). oklch(52.5% 0.175 277), rgb(85, 89, 204).
Aa
White text reads best on this color (5.69:1).
About this color
#5559CC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.175 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.022 away. White text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #5559CC |
| RGB | rgb(85, 89, 204) |
| HSL | hsl(238, 54%, 57%) |
| OKLCH | oklch(52.5% 0.175 277) |
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 #5559CC | 5.69:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #5559CC | 3.68:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #5559CC text on white | 5.69:1 | AA | Lc 78.1 | Fine for body text |
| #5559CC text on black | 3.68:1 | AA large text | Lc -23.7 | 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 600.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D1D7F7
oklch(88.5% 0.044 277.1)
-
Step 300
300
#B3BDF4
oklch(81% 0.079 276.5)
-
Step 400
400
#8D98EE
oklch(70.6% 0.126 277.1)
-
Step 500
500
#737CE8
oklch(63% 0.16 277.2)
-
Step 600
600 (this color)
#5559CC
oklch(52.5% 0.175 277)
-
Step 700
700
#4D51BA
oklch(49.1% 0.162 277)
-
Step 800
800
#3F4396
oklch(42.7% 0.134 277)
-
Step 900
900
#353978
oklch(37.6% 0.106 277.3)
-
Step 950
950
#1F2246
oklch(27% 0.066 277.4)
#5559CC 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) | #006CD0 | 0.069 |
| Deuteranopia (no green cones) | #0062CA | 0.064 |
| Tritanopia (no blue cones) | #00748A | 0.152 |
| Achromatopsia (no color) | #676767 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5559CC
#5559CC
oklch(52.5% 0.175 277)
- #7C6A00
#7C6A00
oklch(52.6% 0.108 97.4)
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 #5559CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.022
- Warm Blue #4B57DB ΔE 0.027
- Dark Periwinkle #665FD1 ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.032
- Light Indigo #6D5ACF ΔE 0.037
- Royal Blue #4169E1 ΔE 0.050
- Bluey Purple #6241C7 ΔE 0.054
- Neon Blue #4361EE ΔE 0.057
Use #5559CC 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.