#555DC7
Closest named color: Iris (#6258C4). oklch(52.9% 0.163 276.1), rgb(85, 93, 199).
Aa
White text reads best on this color (5.56:1).
About this color
#555DC7 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.163 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.021 away. White text reads best on it, at 5.56:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.77:1 |
| White text | 5.56:1 |
Values
| HEX | #555DC7 |
| RGB | rgb(85, 93, 199) |
| HSL | hsl(236, 50%, 56%) |
| OKLCH | oklch(52.9% 0.163 276.1) |
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 #555DC7 | 5.56:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #555DC7 | 3.77:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #555DC7 text on white | 5.56:1 | AA | Lc 77.5 | Fine for body text |
| #555DC7 text on black | 3.77:1 | AA large text | Lc -24.3 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D1D7F5
oklch(88.4% 0.042 276.6)
-
Step 300
300
#B3BDF0
oklch(80.8% 0.073 276)
-
Step 400
400
#8D9AE9
oklch(70.8% 0.116 275.9)
-
Step 500
500
#727EE2
oklch(63% 0.15 276.1)
-
Step 600
600 (this color)
#555DC7
oklch(52.9% 0.163 276.1)
-
Step 700
700
#4C53B4
oklch(49% 0.151 276.2)
-
Step 800
800
#3E4592
oklch(42.7% 0.125 275.8)
-
Step 900
900
#353B74
oklch(37.8% 0.096 276.2)
-
Step 950
950
#1F2344
oklch(27.1% 0.061 276.3)
#555DC7 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) | #1D6DCB | 0.059 |
| Deuteranopia (no green cones) | #0064C5 | 0.063 |
| Tritanopia (no blue cones) | #0C7589 | 0.142 |
| Achromatopsia (no color) | #686868 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555DC7
#555DC7
oklch(52.9% 0.163 276.1)
- #7E6A00
#7E6A00
oklch(52.8% 0.109 96)
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 #555DC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.021
- Dark Periwinkle #665FD1 ΔE 0.030
- Slate Blue #6A5ACD ΔE 0.032
- Warm Blue #4B57DB ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.038
- Royal Blue #4169E1 ΔE 0.050
- French Blue #436BAD ΔE 0.062
- Neon Blue #4361EE ΔE 0.063
Use #555DC7 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.