#1B9DEC
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.9% 0.156 243.2), rgb(27, 157, 236).
Aa
Black text reads best on this color (7.08:1).
About this color
#1B9DEC is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.156 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.030 away. Black text reads best on it, at 7.08:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.08:1 |
| White text | 2.96:1 |
Values
| HEX | #1B9DEC |
| RGB | rgb(27, 157, 236) |
| HSL | hsl(203, 85%, 52%) |
| OKLCH | oklch(66.9% 0.156 243.2) |
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 #1B9DEC | 2.96:1 | Fails | Lc -61.0 | Content text, not long reading |
| Black text on #1B9DEC | 7.08:1 | AAA | Lc 48.4 | Large or bold text, headings |
| #1B9DEC text on white | 2.96:1 | Fails | Lc 55.7 | Large or bold text, headings |
| #1B9DEC text on black | 7.08:1 | AAA | Lc -46.1 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF7FE
oklch(97.1% 0.013 241)
-
Step 100
100
#DBEDFC
oklch(93.7% 0.028 243.1)
-
Step 200
200
#BBDEFB
oklch(88.5% 0.055 243.4)
-
Step 300
300
#88C8FB
oklch(80.9% 0.098 243.4)
-
Step 400
400 (this color)
#1B9DEC
oklch(66.9% 0.156 243.2)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#1B9DEC 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) | #77A0EF | 0.069 |
| Deuteranopia (no green cones) | #5A8EEB | 0.050 |
| Tritanopia (no blue cones) | #00B0B9 | 0.106 |
| Achromatopsia (no color) | #969696 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B9DEC
#1B9DEC
oklch(66.9% 0.156 243.2)
- #D57C00
#D57C00
oklch(66.9% 0.153 62.8)
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 #1B9DEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.041
- Dodger Blue #1E90FF ΔE 0.049
- Cornflower Blue #6495ED ΔE 0.049
- Soft Blue #6488EA ΔE 0.067
- Water Blue #0E87CC ΔE 0.072
- Faded Blue #658CBB ΔE 0.084
- Cool Blue #4984B8 ΔE 0.092
Use #1B9DEC 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.