#5A5FBB
Closest named color: Iris (#6258C4). oklch(52.8% 0.142 278), rgb(90, 95, 187).
Aa
White text reads best on this color (5.54:1).
About this color
#5A5FBB is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.142 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.025 away. White text reads best on it, at 5.54:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #5A5FBB |
| RGB | rgb(90, 95, 187) |
| HSL | hsl(237, 42%, 54%) |
| OKLCH | oklch(52.8% 0.142 278) |
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 #5A5FBB | 5.54:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #5A5FBB | 3.78:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #5A5FBB text on white | 5.54:1 | AA | Lc 77.5 | Fine for body text |
| #5A5FBB text on black | 3.78:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D3D7F1
oklch(88.4% 0.036 278.7)
-
Step 300
300
#B6BDEA
oklch(80.8% 0.064 277.9)
-
Step 400
400
#929AE0
oklch(70.7% 0.103 278.4)
-
Step 500
500
#7880D7
oklch(63.2% 0.13 278)
-
Step 600
600 (this color)
#5A5FBB
oklch(52.8% 0.142 278)
-
Step 700
700
#5156AA
oklch(49.2% 0.132 277.8)
-
Step 800
800
#424689
oklch(42.6% 0.109 278.1)
-
Step 900
900
#383C6E
oklch(37.8% 0.085 278.1)
-
Step 950
950
#202340
oklch(26.9% 0.054 277.6)
#5A5FBB 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) | #346CBE | 0.050 |
| Deuteranopia (no green cones) | #2A65B9 | 0.052 |
| Tritanopia (no blue cones) | #317384 | 0.124 |
| Achromatopsia (no color) | #686868 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A5FBB
#5A5FBB
oklch(52.8% 0.142 278)
- #7C6B00
#7C6B00
oklch(52.8% 0.109 98.2)
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 #5A5FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.025
- Dark Periwinkle #665FD1 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.039
- Light Indigo #6D5ACF ΔE 0.044
- French Blue #436BAD ΔE 0.049
- Warm Blue #4B57DB ΔE 0.059
- Mid Blue #276AB3 ΔE 0.060
- Royal Blue #4169E1 ΔE 0.065
Use #5A5FBB 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.