#017FAB
Closest named color: Nice Blue (#107AB0). oklch(56% 0.114 231.7), rgb(1, 127, 171).
Aa
Black text reads best on this color (4.62:1).
About this color
#017FAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.114 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.018 away. Black text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.62:1 |
| White text | 4.54:1 |
Values
| HEX | #017FAB |
| RGB | rgb(1, 127, 171) |
| HSL | hsl(196, 99%, 34%) |
| OKLCH | oklch(56% 0.114 231.7) |
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 #017FAB | 4.54:1 | AA | Lc -76.4 | Fine for body text |
| Black text on #017FAB | 4.62:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #017FAB text on white | 4.54:1 | AA | Lc 70.9 | Content text, not long reading |
| #017FAB text on black | 4.62:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#A0C7DC
oklch(80.8% 0.051 231.7)
-
Step 400
400
#69AACB
oklch(70.7% 0.082 231.7)
-
Step 500
500
#3A94BD
oklch(63% 0.104 231.6)
-
Step 600
600 (this color)
#017FAB
oklch(56% 0.114 231.7)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#10485F
oklch(37.8% 0.068 230.5)
-
Step 950
950
#0C2A38
oklch(27% 0.044 231.9)
#017FAB 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) | #697EAD | 0.075 |
| Deuteranopia (no green cones) | #5570AA | 0.062 |
| Tritanopia (no blue cones) | #008B8E | 0.066 |
| Achromatopsia (no color) | #767676 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #017FAB
#017FAB
oklch(56% 0.114 231.7)
- #A85F2F
#A85F2F
oklch(56% 0.114 51.6)
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 #017FAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.018
- Blue NCS #118AB2 ΔE 0.033
- Cerulean #457B9D ΔE 0.037
- Teal Blue #01889F ΔE 0.037
- Ocean #017B92 ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.041
- Sea Blue #047495 ΔE 0.042
Use #017FAB 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.