#1766D0
Closest named color: Royal Blue (#4169E1). oklch(52.8% 0.18 258.1), rgb(23, 102, 208).
Aa
White text reads best on this color (5.45:1).
About this color
#1766D0 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.180 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.043 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.84:1 |
| White text | 5.45:1 |
Values
| HEX | #1766D0 |
| RGB | rgb(23, 102, 208) |
| HSL | hsl(214, 80%, 45%) |
| OKLCH | oklch(52.8% 0.18 258.1) |
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 #1766D0 | 5.45:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #1766D0 | 3.84:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #1766D0 text on white | 5.45:1 | AA | Lc 76.6 | Fine for body text |
| #1766D0 text on black | 3.84:1 | AA large text | Lc -25.2 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A1C3F5
oklch(81% 0.08 257.9)
-
Step 400
400
#6CA1F0
oklch(70.6% 0.13 258.2)
-
Step 500
500
#4488EB
oklch(63.2% 0.164 258)
-
Step 600
600 (this color)
#1766D0
oklch(52.8% 0.18 258.1)
-
Step 700
700
#145CBD
oklch(49.1% 0.167 258.1)
-
Step 800
800
#144C99
oklch(42.8% 0.138 258)
-
Step 900
900
#184079
oklch(37.7% 0.107 257.9)
-
Step 950
950
#0F2647
oklch(27% 0.068 257.7)
#1766D0 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) | #1C72D4 | 0.032 |
| Deuteranopia (no green cones) | #0062CE | 0.014 |
| Tritanopia (no blue cones) | #008091 | 0.136 |
| Achromatopsia (no color) | #696969 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1766D0
#1766D0
oklch(52.8% 0.18 258.1)
- #8D6200
#8D6200
oklch(52.8% 0.11 78.7)
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 #1766D0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.049
- Azul #1D5DEC ΔE 0.049
- Warm Blue #4B57DB ΔE 0.054
- Neon Blue #4361EE ΔE 0.058
- Windows Blue #3778BF ΔE 0.065
- French Blue #436BAD ΔE 0.066
Use #1766D0 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.