#1773F1
Closest named color: Cerulean Blue (#056EEE). oklch(58% 0.206 258.6), rgb(23, 115, 241).
Aa
Black text reads best on this color (4.75:1).
About this color
#1773F1 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.206 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.015 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.206) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #1773F1 |
| RGB | rgb(23, 115, 241) |
| HSL | hsl(215, 89%, 52%) |
| OKLCH | oklch(58% 0.206 258.6) |
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 #1773F1 | 4.41:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #1773F1 | 4.75:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #1773F1 text on white | 4.41:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #1773F1 text on black | 4.75:1 | AA | Lc -31.8 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9CC2FD
oklch(80.8% 0.094 259)
-
Step 400
400
#64A0FC
oklch(70.6% 0.149 258.7)
-
Step 500
500
#3785FA
oklch(63.1% 0.191 258.7)
-
Step 600
600 (this color)
#1773F1
oklch(58% 0.206 258.6)
-
Step 700
700
#0059C8
oklch(49.1% 0.188 258.7)
-
Step 800
800
#0449A4
oklch(42.7% 0.16 258.7)
-
Step 900
900
#103E82
oklch(37.6% 0.125 258.9)
-
Step 950
950
#0B254C
oklch(27% 0.079 258.6)
#1773F1 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) | #0582F5 | 0.037 |
| Deuteranopia (no green cones) | #006FEF | 0.013 |
| Tritanopia (no blue cones) | #0092A7 | 0.156 |
| Achromatopsia (no color) | #787878 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1773F1
#1773F1
oklch(58% 0.206 258.6)
- #A07000
#A07000
oklch(58% 0.12 78.9)
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 #1773F1, closest first.
No curated palette has a color within ΔE 0.04 of #1773F1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.015
- Clear Blue #247AFD ΔE 0.026
- Royal Blue #4169E1 ΔE 0.038
- Bright Blue #0165FC ΔE 0.039
- Neon Blue #4361EE ΔE 0.046
- Azul #1D5DEC ΔE 0.052
- Warm Blue #4B57DB ΔE 0.075
- Cornflower #6A79F7 ΔE 0.076
Use #1773F1 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.