#5555D2
Closest named color: Warm Blue (#4B57DB). oklch(52.2% 0.188 277.7), rgb(85, 85, 210).
Aa
White text reads best on this color (5.80:1).
About this color
#5555D2 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.188 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.019 away. White text reads best on it, at 5.80:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #5555D2 |
| RGB | rgb(85, 85, 210) |
| HSL | hsl(240, 58%, 58%) |
| OKLCH | oklch(52.2% 0.188 277.7) |
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 #5555D2 | 5.80:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #5555D2 | 3.61:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #5555D2 text on white | 5.80:1 | AA | Lc 78.6 | Fine for body text |
| #5555D2 text on black | 3.61:1 | AA large text | Lc -23.2 | 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
#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
#B2BBFB
oklch(80.8% 0.091 278)
-
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
#5D5DE5
oklch(55.7% 0.201 277.7)
-
Step 700
700 (this color)
#5555D2
oklch(52.2% 0.188 277.7)
-
Step 800
800
#3F3EA1
oklch(42.6% 0.156 277.9)
-
Step 900
900
#353780
oklch(37.8% 0.121 277.8)
-
Step 950
950
#1E214B
oklch(27.1% 0.077 276.9)
#5555D2 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) | #006BD6 | 0.073 |
| Deuteranopia (no green cones) | #0060CF | 0.066 |
| Tritanopia (no blue cones) | #00738B | 0.161 |
| Achromatopsia (no color) | #656565 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5555D2
#5555D2
oklch(52.2% 0.188 277.7)
- #7B6900
#7B6900
oklch(52.2% 0.108 97.3)
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 #5555D2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.019
- Iris #6258C4 ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.037
- Light Indigo #6D5ACF ΔE 0.040
- Bluey Purple #6241C7 ΔE 0.047
- Neon Blue #4361EE ΔE 0.052
- Royal Blue #4169E1 ΔE 0.053
Use #5555D2 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.