#1798F3
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.1% 0.169 247.2), rgb(23, 152, 243).
Aa
Black text reads best on this color (6.82:1).
About this color
#1798F3 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.169 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.024 away. Black text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #1798F3 |
| RGB | rgb(23, 152, 243) |
| HSL | hsl(205, 90%, 52%) |
| OKLCH | oklch(66.1% 0.169 247.2) |
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 #1798F3 | 3.07:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #1798F3 | 6.82:1 | AA | Lc 47.0 | Large or bold text, headings |
| #1798F3 text on white | 3.07:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #1798F3 text on black | 6.82:1 | AA | Lc -44.7 | 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 500.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C2DDF6
oklch(88.6% 0.045 246.3)
-
Step 300
300
#96C6F4
oklch(80.9% 0.083 247.8)
-
Step 400
400
#55A7EE
oklch(70.7% 0.132 247.1)
-
Step 500
500 (this color)
#1798F3
oklch(66.1% 0.169 247.2)
-
Step 600
600
#0078C4
oklch(55.7% 0.147 247.1)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#004473
oklch(37.7% 0.1 247.4)
-
Step 950
950
#012846
oklch(26.9% 0.07 247.1)
#1798F3 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) | #6B9DF7 | 0.060 |
| Deuteranopia (no green cones) | #4A8AF1 | 0.041 |
| Tritanopia (no blue cones) | #00AEBA | 0.119 |
| Achromatopsia (no color) | #939393 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1798F3
#1798F3
oklch(66.1% 0.169 247.2)
- #CC7E00
#CC7E00
oklch(66.1% 0.146 67.5)
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 #1798F3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.024
- Dodger Blue #1E90FF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.034
- Cornflower Blue #6495ED ΔE 0.049
- Soft Blue #6488EA ΔE 0.059
- Water Blue #0E87CC ΔE 0.070
- Clear Blue #247AFD ΔE 0.081
- Faded Blue #658CBB ΔE 0.092
Use #1798F3 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.