#5553DA
Closest named color: Warm Blue (#4B57DB). oklch(52.5% 0.2 277.6), rgb(85, 83, 218).
Aa
White text reads best on this color (5.77:1).
About this color
#5553DA is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.200 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.015 away. White text reads best on it, at 5.77:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #5553DA |
| RGB | rgb(85, 83, 218) |
| HSL | hsl(241, 65%, 59%) |
| OKLCH | oklch(52.5% 0.2 277.6) |
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 #5553DA | 5.77:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #5553DA | 3.63:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #5553DA text on white | 5.77:1 | AA | Lc 78.4 | Fine for body text |
| #5553DA text on black | 3.63:1 | AA large text | Lc -23.4 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D1D7FB
oklch(88.6% 0.05 277.9)
-
Step 300
300
#B2BCFB
oklch(81% 0.09 277.2)
-
Step 400
400
#8C96F9
oklch(70.8% 0.144 277.7)
-
Step 500
500
#7278F6
oklch(63.1% 0.185 277.6)
-
Step 600
600 (this color)
#5553DA
oklch(52.5% 0.2 277.6)
-
Step 700
700
#4D4BC7
oklch(49.1% 0.187 277.7)
-
Step 800
800
#3F3FA1
oklch(42.8% 0.155 277.6)
-
Step 900
900
#35377F
oklch(37.8% 0.119 277.8)
-
Step 950
950
#1E214B
oklch(27.1% 0.077 276.9)
#5553DA 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) | #006BDE | 0.074 |
| Deuteranopia (no green cones) | #0060D7 | 0.066 |
| Tritanopia (no blue cones) | #00758F | 0.169 |
| Achromatopsia (no color) | #666666 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5553DA
#5553DA
oklch(52.5% 0.2 277.6)
- #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 #5553DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.015
- Iris #6258C4 ΔE 0.042
- Dark Periwinkle #665FD1 ΔE 0.043
- Slate Blue #6A5ACD ΔE 0.043
- Light Indigo #6D5ACF ΔE 0.045
- Neon Blue #4361EE ΔE 0.046
- Bluey Purple #6241C7 ΔE 0.050
- Royal Blue #4169E1 ΔE 0.053
Use #5553DA 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.