#289CCC
Closest named color: Faded Blue (#658CBB). oklch(65.2% 0.121 231.4), rgb(40, 156, 204).
Aa
Black text reads best on this color (6.71:1).
About this color
#289CCC is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.121 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.058 away. Black text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #289CCC |
| RGB | rgb(40, 156, 204) |
| HSL | hsl(198, 67%, 48%) |
| OKLCH | oklch(65.2% 0.121 231.4) |
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 #289CCC | 3.12:1 | AA large text | Lc -63.3 | Content text, not long reading |
| Black text on #289CCC | 6.71:1 | AA | Lc 46.2 | Large or bold text, headings |
| #289CCC text on white | 3.12:1 | AA large text | Lc 57.9 | Large or bold text, headings |
| #289CCC text on black | 6.71:1 | AA | Lc -43.9 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF3
oklch(93.5% 0.017 230.9)
-
Step 200
200
#C4DEEB
oklch(88.5% 0.033 229.3)
-
Step 300
300
#9AC8E0
oklch(80.8% 0.059 231.1)
-
Step 400
400
#5EABD1
oklch(70.7% 0.094 231.6)
-
Step 500
500 (this color)
#289CCC
oklch(65.2% 0.121 231.4)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#005776
oklch(42.8% 0.087 231.2)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#052A3A
oklch(26.8% 0.05 231.7)
#289CCC 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) | #849ACE | 0.081 |
| Deuteranopia (no green cones) | #6E8BCB | 0.068 |
| Tritanopia (no blue cones) | #00A9AC | 0.071 |
| Achromatopsia (no color) | #929292 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #289CCC
#289CCC
oklch(65.2% 0.121 231.4)
- #C97946
#C97946
oklch(65.3% 0.12 51.7)
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 #289CCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.061
- Blue NCS #118AB2 ΔE 0.061
- Water Blue #0E87CC ΔE 0.063
- Chefchaouen Blue #4895EF ΔE 0.064
- Turquoise Blue #06B1C4 ΔE 0.065
- Cool Blue #4984B8 ΔE 0.067
- Dusty Blue #5A86AD ΔE 0.070
Use #289CCC 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.