#0075D3
Closest named color: Windows Blue (#3778BF). oklch(56% 0.169 252.2), rgb(0, 117, 211).
Aa
White text reads best on this color (4.68:1).
About this color
#0075D3 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.169 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.040 away. White text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.48:1 |
| White text | 4.68:1 |
Values
| HEX | #0075D3 |
| RGB | rgb(0, 117, 211) |
| HSL | hsl(207, 100%, 41%) |
| OKLCH | oklch(56% 0.169 252.2) |
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 #0075D3 | 4.68:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #0075D3 | 4.48:1 | AA large text | Lc 32.3 | Non-text elements, placeholder text |
| #0075D3 text on white | 4.68:1 | AA | Lc 71.8 | Content text, not long reading |
| #0075D3 text on black | 4.48:1 | AA large text | Lc -29.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DCF5
oklch(88.6% 0.042 251.7)
-
Step 300
300
#9DC4F1
oklch(80.8% 0.076 252.3)
-
Step 400
400
#66A4EA
oklch(70.6% 0.122 252.5)
-
Step 500
500
#378CE4
oklch(63.2% 0.155 252.3)
-
Step 600
600 (this color)
#0075D3
oklch(56% 0.169 252.2)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#0F4275
oklch(37.6% 0.102 252.6)
-
Step 950
950
#0B2745
oklch(26.9% 0.065 252.8)
#0075D3 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) | #427DD7 | 0.043 |
| Deuteranopia (no green cones) | #0F6CD1 | 0.023 |
| Tritanopia (no blue cones) | #008C9A | 0.123 |
| Achromatopsia (no color) | #747474 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0075D3
#0075D3
oklch(56% 0.169 252.2)
- #9F6700
#9F6700
oklch(56.1% 0.12 72.2)
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 #0075D3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.040
- Cerulean Blue #056EEE ΔE 0.047
- Royal Blue #4169E1 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.054
- Water Blue #0E87CC ΔE 0.054
- Nice Blue #107AB0 ΔE 0.059
- French Blue #436BAD ΔE 0.065
- Clear Blue #247AFD ΔE 0.067
Use #0075D3 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.