#017AC6
Closest named color: Windows Blue (#3778BF). oklch(56.3% 0.147 246.8), rgb(1, 122, 198).
Aa
Black text reads best on this color (4.60:1).
About this color
#017AC6 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.147 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.023 away. Black text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.60:1 |
| White text | 4.56:1 |
Values
| HEX | #017AC6 |
| RGB | rgb(1, 122, 198) |
| HSL | hsl(203, 99%, 39%) |
| OKLCH | oklch(56.3% 0.147 246.8) |
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 #017AC6 | 4.56:1 | AA | Lc -76.5 | Fine for body text |
| Black text on #017AC6 | 4.60:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #017AC6 text on white | 4.56:1 | AA | Lc 71.0 | Content text, not long reading |
| #017AC6 text on black | 4.60:1 | AA | Lc -30.7 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9EC5EA
oklch(80.8% 0.067 247.3)
-
Step 400
400
#67A7DF
oklch(70.8% 0.106 246.4)
-
Step 500
500
#378FD6
oklch(63.1% 0.135 246.7)
-
Step 600
600 (this color)
#017AC6
oklch(56.3% 0.147 246.8)
-
Step 700
700
#0065A5
oklch(49.2% 0.128 246.7)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#0F446D
oklch(37.6% 0.088 247)
-
Step 950
950
#0C2840
oklch(26.9% 0.056 247.6)
#017AC6 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) | #547EC9 | 0.053 |
| Deuteranopia (no green cones) | #386FC5 | 0.035 |
| Tritanopia (no blue cones) | #008D96 | 0.105 |
| Achromatopsia (no color) | #767676 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #017AC6
#017AC6
oklch(56.3% 0.147 246.8)
- #A56400
#A56400
oklch(56.3% 0.125 66.7)
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 #017AC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.023
- Nice Blue #107AB0 ΔE 0.035
- Water Blue #0E87CC ΔE 0.037
- Mid Blue #276AB3 ΔE 0.048
- Flat Blue #3C73A8 ΔE 0.050
- Steel Blue #4682B4 ΔE 0.054
- French Blue #436BAD ΔE 0.056
- Cool Blue #4984B8 ΔE 0.057
Use #017AC6 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.