#5975CC
Closest named color: Windows Blue (#3778BF). oklch(58.2% 0.137 268.5), rgb(89, 117, 204).
Aa
Black text reads best on this color (4.84:1).
About this color
#5975CC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.137 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.041 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #5975CC |
| RGB | rgb(89, 117, 204) |
| HSL | hsl(225, 53%, 57%) |
| OKLCH | oklch(58.2% 0.137 268.5) |
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 #5975CC | 4.33:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #5975CC | 4.84:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #5975CC text on white | 4.33:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #5975CC text on black | 4.84:1 | AA | Lc -31.8 | Non-text elements, placeholder text |
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
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#B0C0EA
oklch(81% 0.062 268.6)
-
Step 400
400
#879EDF
oklch(70.7% 0.099 268.9)
-
Step 500
500
#6985D6
oklch(63.1% 0.126 268.2)
-
Step 600
600 (this color)
#5975CC
oklch(58.2% 0.137 268.5)
-
Step 700
700
#425BA9
oklch(49.2% 0.128 268.1)
-
Step 800
800
#374A89
oklch(42.7% 0.107 268.9)
-
Step 900
900
#2F3F6D
oklch(37.8% 0.082 267.9)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#5975CC 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) | #4F7FCF | 0.027 |
| Deuteranopia (no green cones) | #4174CA | 0.027 |
| Tritanopia (no blue cones) | #0C8896 | 0.124 |
| Achromatopsia (no color) | #797979 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5975CC
#5975CC
oklch(58.2% 0.137 268.5)
- #987600
#987600
oklch(58.3% 0.119 88.4)
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 #5975CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.041
- Royal Blue #4169E1 ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.058
- Cool Blue #4984B8 ΔE 0.059
- Steel Blue #4682B4 ΔE 0.060
- French Blue #436BAD ΔE 0.060
- Water Blue #0E87CC ΔE 0.064
- Soft Blue #6488EA ΔE 0.065
Use #5975CC 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.