#5663BF
Closest named color: Iris (#6258C4). oklch(53.6% 0.143 274.5), rgb(86, 99, 191).
Aa
White text reads best on this color (5.33:1).
About this color
#5663BF is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.143 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.032 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #5663BF |
| RGB | rgb(86, 99, 191) |
| HSL | hsl(233, 45%, 54%) |
| OKLCH | oklch(53.6% 0.143 274.5) |
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 #5663BF | 5.33:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #5663BF | 3.93:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #5663BF text on white | 5.33:1 | AA | Lc 76.4 | Fine for body text |
| #5663BF text on black | 3.93:1 | AA large text | Lc -25.4 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B4BEEB
oklch(80.9% 0.065 275.1)
-
Step 400
400
#8D9CE1
oklch(70.8% 0.103 274.1)
-
Step 500
500
#7281D8
oklch(63% 0.132 274.6)
-
Step 600
600 (this color)
#5663BF
oklch(53.6% 0.143 274.5)
-
Step 700
700
#4B57AB
oklch(49.1% 0.134 274.3)
-
Step 800
800
#3E488A
oklch(42.8% 0.109 274.4)
-
Step 900
900
#343D6F
oklch(37.8% 0.086 273.9)
-
Step 950
950
#1F2441
oklch(27.1% 0.054 274.8)
#5663BF 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) | #376FC2 | 0.042 |
| Deuteranopia (no green cones) | #2A67BD | 0.045 |
| Tritanopia (no blue cones) | #207788 | 0.126 |
| Achromatopsia (no color) | #6B6B6B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5663BF
#5663BF
oklch(53.6% 0.143 274.5)
- #826C00
#826C00
oklch(53.7% 0.11 94.9)
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 #5663BF, closest first.
No curated palette has a color within ΔE 0.04 of #5663BF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.032
- Dark Periwinkle #665FD1 ΔE 0.038
- Slate Blue #6A5ACD ΔE 0.042
- French Blue #436BAD ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.047
- Mid Blue #276AB3 ΔE 0.054
- Royal Blue #4169E1 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.057
Use #5663BF 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.