#017EB8
Closest named color: Nice Blue (#107AB0). oklch(56.5% 0.127 239.2), rgb(1, 126, 184).
Aa
Black text reads best on this color (4.67:1).
About this color
#017EB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.127 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.015 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.67:1 |
| White text | 4.48:1 |
Values
| HEX | #017EB8 |
| RGB | rgb(1, 126, 184) |
| HSL | hsl(199, 99%, 36%) |
| OKLCH | oklch(56.5% 0.127 239.2) |
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 #017EB8 | 4.48:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #017EB8 | 4.67:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #017EB8 text on white | 4.48:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #017EB8 text on black | 4.67:1 | AA | Lc -31.1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DDEC
oklch(88.6% 0.031 237.6)
-
Step 300
300
#9FC6E2
oklch(80.8% 0.057 239.6)
-
Step 400
400
#68A9D4
oklch(70.8% 0.092 238.9)
-
Step 500
500
#3892C8
oklch(63% 0.117 239.1)
-
Step 600
600 (this color)
#017EB8
oklch(56.5% 0.127 239.2)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#0F4666
oklch(37.6% 0.077 239.9)
-
Step 950
950
#0C293B
oklch(26.9% 0.048 239.4)
#017EB8 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) | #627FBB | 0.066 |
| Deuteranopia (no green cones) | #4B70B7 | 0.052 |
| Tritanopia (no blue cones) | #008D93 | 0.083 |
| Achromatopsia (no color) | #777777 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #017EB8
#017EB8
oklch(56.5% 0.127 239.2)
- #AB6011
#AB6011
oklch(56.4% 0.127 59.2)
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 #017EB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.015
- Windows Blue #3778BF ΔE 0.030
- Water Blue #0E87CC ΔE 0.037
- Steel Blue #4682B4 ΔE 0.039
- Blue NCS #118AB2 ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.044
- Muted Blue #3B719F ΔE 0.049
Use #017EB8 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.