#2789C5
Closest named color: Water Blue (#0E87CC). oklch(60.3% 0.126 241.2), rgb(39, 137, 197).
Aa
Black text reads best on this color (5.47:1).
About this color
#2789C5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.126 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.016 away. Black text reads best on it, at 5.47:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #2789C5 |
| RGB | rgb(39, 137, 197) |
| HSL | hsl(203, 67%, 46%) |
| OKLCH | oklch(60.3% 0.126 241.2) |
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 #2789C5 | 3.83:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #2789C5 | 5.47:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #2789C5 text on white | 3.83:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #2789C5 text on black | 5.47:1 | AA | Lc -36.2 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEE
oklch(88.6% 0.034 239.9)
-
Step 300
300
#9EC6E5
oklch(80.8% 0.061 241.8)
-
Step 400
400
#65A8D8
oklch(70.6% 0.098 241.2)
-
Step 500
500 (this color)
#2789C5
oklch(60.3% 0.126 241.2)
-
Step 600
600
#007BB8
oklch(55.7% 0.13 241.1)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#0A4669
oklch(37.7% 0.082 241.2)
-
Step 950
950
#0A293D
oklch(26.9% 0.052 241)
#2789C5 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) | #6D8AC8 | 0.062 |
| Deuteranopia (no green cones) | #577CC4 | 0.048 |
| Tritanopia (no blue cones) | #00989E | 0.085 |
| Achromatopsia (no color) | #828282 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2789C5
#2789C5
oklch(60.3% 0.126 241.2)
- #B66D22
#B66D22
oklch(60.3% 0.126 61.1)
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 #2789C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.016
- Cool Blue #4984B8 ΔE 0.028
- Steel Blue #4682B4 ΔE 0.032
- Blue NCS #118AB2 ΔE 0.033
- Off Blue #5684AE ΔE 0.046
- Windows Blue #3778BF ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.050
- Nice Blue #107AB0 ΔE 0.052
Use #2789C5 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.