#1399EE
Closest named color: Chefchaouen Blue (#4895EF). oklch(66% 0.162 245.2), rgb(19, 153, 238).
Aa
Black text reads best on this color (6.81:1).
About this color
#1399EE is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.162 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.026 away. Black text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.81:1 |
| White text | 3.07:1 |
Values
| HEX | #1399EE |
| RGB | rgb(19, 153, 238) |
| HSL | hsl(203, 87%, 50%) |
| OKLCH | oklch(66% 0.162 245.2) |
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 #1399EE | 3.07:1 | AA large text | Lc -62.5 | Content text, not long reading |
| Black text on #1399EE | 6.81:1 | AA | Lc 47.0 | Large or bold text, headings |
| #1399EE text on white | 3.07:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #1399EE text on black | 6.81:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C2DDF5
oklch(88.5% 0.044 245.1)
-
Step 300
300
#96C7F1
oklch(81% 0.079 244.9)
-
Step 400
400
#55A8EA
oklch(70.8% 0.126 245)
-
Step 500
500 (this color)
#1399EE
oklch(66% 0.162 245.2)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950
#012945
oklch(27.1% 0.067 245)
#1399EE 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) | #709DF2 | 0.066 |
| Deuteranopia (no green cones) | #518BEC | 0.045 |
| Tritanopia (no blue cones) | #00AEB8 | 0.114 |
| Achromatopsia (no color) | #939393 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1399EE
#1399EE
oklch(66% 0.162 245.2)
- #CE7C00
#CE7C00
oklch(66% 0.148 65.4)
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 #1399EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.034
- Dodger Blue #1E90FF ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.050
- Soft Blue #6488EA ΔE 0.062
- Water Blue #0E87CC ΔE 0.066
- Faded Blue #658CBB ΔE 0.086
- Clear Blue #247AFD ΔE 0.086
Use #1399EE 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.