#017AAF
Closest named color: Nice Blue (#107AB0). oklch(55% 0.121 237.6), rgb(1, 122, 175).
Aa
White text reads best on this color (4.76:1).
About this color
#017AAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.121 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.004 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #017AAF |
| RGB | rgb(1, 122, 175) |
| HSL | hsl(198, 99%, 35%) |
| OKLCH | oklch(55% 0.121 237.6) |
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 #017AAF | 4.76:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #017AAF | 4.40:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #017AAF text on white | 4.76:1 | AA | Lc 72.5 | Content text, not long reading |
| #017AAF text on black | 4.40:1 | AA large text | Lc -29.2 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#A0C6E0
oklch(80.8% 0.055 238.3)
-
Step 400
400
#6AA9D1
oklch(70.8% 0.088 237.6)
-
Step 500
500
#3C92C4
oklch(63% 0.111 237.8)
-
Step 600
600 (this color)
#017AAF
oklch(55% 0.121 237.6)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#02557B
oklch(42.6% 0.093 237.4)
-
Step 900
900
#124763
oklch(37.8% 0.072 236.7)
-
Step 950
950
#0D293A
oklch(26.9% 0.046 238.6)
#017AAF 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) | #607AB1 | 0.066 |
| Deuteranopia (no green cones) | #4B6CAE | 0.053 |
| Tritanopia (no blue cones) | #00888D | 0.077 |
| Achromatopsia (no color) | #737373 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #017AAF
#017AAF
oklch(55% 0.121 237.6)
- #A55D19
#A55D19
oklch(55.1% 0.121 58)
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 #017AAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.004
- Flat Blue #3C73A8 ΔE 0.031
- Ocean Blue #03719C ΔE 0.036
- Muted Blue #3B719F ΔE 0.037
- Windows Blue #3778BF ΔE 0.037
- Sea Blue #047495 ΔE 0.042
- Cerulean #457B9D ΔE 0.044
- Dull Blue #49759C ΔE 0.045
Use #017AAF 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.