#289AEB
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.4% 0.154 245.5), rgb(40, 154, 235).
Aa
Black text reads best on this color (6.91:1).
About this color
#289AEB is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.154 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.023 away. Black text reads best on it, at 6.91:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.91:1 |
| White text | 3.03:1 |
Values
| HEX | #289AEB |
| RGB | rgb(40, 154, 235) |
| HSL | hsl(205, 83%, 54%) |
| OKLCH | oklch(66.4% 0.154 245.5) |
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 #289AEB | 3.03:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #289AEB | 6.91:1 | AA | Lc 47.4 | Large or bold text, headings |
| #289AEB text on white | 3.03:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #289AEB text on black | 6.91:1 | AA | Lc -45.1 | 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 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C3DDF4
oklch(88.6% 0.042 245)
-
Step 300
300
#98C6EF
oklch(80.8% 0.076 245.8)
-
Step 400
400
#5AA7E7
oklch(70.6% 0.121 245.8)
-
Step 500
500 (this color)
#289AEB
oklch(66.4% 0.154 245.5)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950
#042943
oklch(27.1% 0.063 244.6)
#289AEB 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) | #749DEE | 0.062 |
| Deuteranopia (no green cones) | #588CE9 | 0.045 |
| Tritanopia (no blue cones) | #00AEB7 | 0.109 |
| Achromatopsia (no color) | #949494 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #289AEB
#289AEB
oklch(66.4% 0.154 245.5)
- #D07D00
#D07D00
oklch(66.4% 0.149 65.3)
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 #289AEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.023
- Dark Sky Blue #448EE4 ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.044
- Soft Blue #6488EA ΔE 0.060
- Water Blue #0E87CC ΔE 0.067
- Faded Blue #658CBB ΔE 0.080
- Cool Blue #4984B8 ΔE 0.086
Use #289AEB 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.