#016CD3
Closest named color: Cerulean Blue (#056EEE). oklch(54% 0.179 255.2), rgb(1, 108, 211).
Aa
White text reads best on this color (5.13:1).
About this color
#016CD3 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.179 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.042 away. White text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.08:1 |
| White text | 5.13:1 |
Values
| HEX | #016CD3 |
| RGB | rgb(1, 108, 211) |
| HSL | hsl(209, 99%, 42%) |
| OKLCH | oklch(54% 0.179 255.2) |
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 #016CD3 | 5.13:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #016CD3 | 4.08:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #016CD3 text on white | 5.13:1 | AA | Lc 74.6 | Content text, not long reading |
| #016CD3 text on black | 4.08:1 | AA large text | Lc -27.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9EC4F4
oklch(81% 0.08 254.5)
-
Step 400
400
#67A3EF
oklch(70.7% 0.128 255)
-
Step 500
500
#3A8AEA
oklch(63.2% 0.164 255)
-
Step 600
600 (this color)
#016CD3
oklch(54% 0.179 255.2)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#054D98
oklch(42.7% 0.138 255.3)
-
Step 900
900
#124179
oklch(37.7% 0.108 255.4)
-
Step 950
950
#0C2747
oklch(27.1% 0.068 254.6)
#016CD3 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) | #2B76D7 | 0.034 |
| Deuteranopia (no green cones) | #0066D1 | 0.016 |
| Tritanopia (no blue cones) | #008595 | 0.133 |
| Achromatopsia (no color) | #6D6D6D | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #016CD3
#016CD3
oklch(54% 0.179 255.2)
- #956300
#956300
oklch(54% 0.114 74.6)
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 #016CD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.042
- Royal Blue #4169E1 ΔE 0.042
- Mid Blue #276AB3 ΔE 0.050
- Azul #1D5DEC ΔE 0.054
- Windows Blue #3778BF ΔE 0.056
- Neon Blue #4361EE ΔE 0.061
- Warm Blue #4B57DB ΔE 0.065
- Bright Blue #0165FC ΔE 0.065
Use #016CD3 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.