#5571D7
Closest named color: Royal Blue (#4169E1). oklch(57.9% 0.159 269.4), rgb(85, 113, 215).
Aa
Black text reads best on this color (4.72:1).
About this color
#5571D7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.159 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #5571D7 |
| RGB | rgb(85, 113, 215) |
| HSL | hsl(227, 62%, 59%) |
| OKLCH | oklch(57.9% 0.159 269.4) |
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 #5571D7 | 4.44:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #5571D7 | 4.72:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #5571D7 text on white | 4.44:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #5571D7 text on black | 4.72:1 | AA | Lc -31.1 | Non-text elements, placeholder text |
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
#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
#AEBFF0
oklch(80.9% 0.072 269.8)
-
Step 400
400
#849DE8
oklch(70.7% 0.114 269.3)
-
Step 500
500
#6683E1
oklch(63.2% 0.145 269)
-
Step 600
600 (this color)
#5571D7
oklch(57.9% 0.159 269.4)
-
Step 700
700
#4058B3
oklch(49.1% 0.147 269.3)
-
Step 800
800
#354891
oklch(42.7% 0.122 269.6)
-
Step 900
900
#2D3D74
oklch(37.6% 0.096 269.2)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#5571D7 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) | #3E7EDB | 0.037 |
| Deuteranopia (no green cones) | #2772D5 | 0.041 |
| Tritanopia (no blue cones) | #00889A | 0.136 |
| Achromatopsia (no color) | #787878 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5571D7
#5571D7
oklch(57.9% 0.159 269.4)
- #967500
#967500
oklch(57.8% 0.118 88.9)
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 #5571D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.047
- Windows Blue #3778BF ΔE 0.053
- Cornflower #6A79F7 ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.060
- Neon Blue #4361EE ΔE 0.060
- Light Indigo #6D5ACF ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.064
Use #5571D7 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.