#5664BB
Closest named color: Iris (#6258C4). oklch(53.5% 0.136 274), rgb(86, 100, 187).
Aa
White text reads best on this color (5.33:1).
About this color
#5664BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.136 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.037 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #5664BB |
| RGB | rgb(86, 100, 187) |
| HSL | hsl(232, 43%, 54%) |
| OKLCH | oklch(53.5% 0.136 274) |
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 #5664BB | 5.33:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #5664BB | 3.93:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #5664BB text on white | 5.33:1 | AA | Lc 76.4 | Fine for body text |
| #5664BB 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B4BEE9
oklch(80.8% 0.062 274.7)
-
Step 400
400
#8D9CDE
oklch(70.7% 0.098 273.8)
-
Step 500
500
#7282D5
oklch(63% 0.126 274)
-
Step 600
600 (this color)
#5664BB
oklch(53.5% 0.136 274)
-
Step 700
700
#4C58A7
oklch(49.1% 0.126 274.3)
-
Step 800
800
#3E4888
oklch(42.6% 0.106 274.3)
-
Step 900
900
#343D6D
oklch(37.7% 0.083 273.8)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#5664BB 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) | #3D6FBE | 0.037 |
| Deuteranopia (no green cones) | #3167B9 | 0.040 |
| Tritanopia (no blue cones) | #257786 | 0.121 |
| Achromatopsia (no color) | #6B6B6B | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5664BB
#5664BB
oklch(53.5% 0.136 274)
- #826B00
#826B00
oklch(53.4% 0.11 94)
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 #5664BB, closest first.
No curated palette has a color within ΔE 0.04 of #5664BB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.037
- French Blue #436BAD ΔE 0.038
- Dark Periwinkle #665FD1 ΔE 0.044
- Slate Blue #6A5ACD ΔE 0.047
- Mid Blue #276AB3 ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.052
- Windows Blue #3778BF ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.061
Use #5664BB 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.