#5975D3
Closest named color: Windows Blue (#3778BF). oklch(58.7% 0.147 269), rgb(89, 117, 211).
Aa
Black text reads best on this color (4.90:1).
About this color
#5975D3 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.147 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.048 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #5975D3 |
| RGB | rgb(89, 117, 211) |
| HSL | hsl(226, 58%, 59%) |
| OKLCH | oklch(58.7% 0.147 269) |
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 #5975D3 | 4.27:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #5975D3 | 4.90:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #5975D3 text on white | 4.27:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #5975D3 text on black | 4.90:1 | AA | Lc -32.3 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#AFC0EC
oklch(81% 0.065 268.4)
-
Step 400
400
#859EE3
oklch(70.8% 0.105 268.4)
-
Step 500
500
#6884DB
oklch(63.1% 0.135 268.9)
-
Step 600
600 (this color)
#5975D3
oklch(58.7% 0.147 269)
-
Step 700
700
#4159AE
oklch(49% 0.138 269)
-
Step 800
800
#36498C
oklch(42.6% 0.113 269.3)
-
Step 900
900
#2F3E70
oklch(37.7% 0.088 269.3)
-
Step 950
950
#1B2542
oklch(27.1% 0.056 268.2)
#5975D3 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) | #4A80D7 | 0.030 |
| Deuteranopia (no green cones) | #3975D1 | 0.033 |
| Tritanopia (no blue cones) | #008A9A | 0.130 |
| Achromatopsia (no color) | #7A7A7A | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5975D3
#5975D3
oklch(58.7% 0.147 269)
- #997700
#997700
oklch(58.6% 0.12 88.6)
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 #5975D3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.048
- Royal Blue #4169E1 ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.055
- Cornflower #6A79F7 ΔE 0.060
- Soft Blue #6488EA ΔE 0.060
- Cool Blue #4984B8 ΔE 0.066
- Dark Sky Blue #448EE4 ΔE 0.066
- Water Blue #0E87CC ΔE 0.067
Use #5975D3 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.