#2789D3
Closest named color: Water Blue (#0E87CC). oklch(61.1% 0.142 246.5), rgb(39, 137, 211).
Aa
Black text reads best on this color (5.60:1).
About this color
#2789D3 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.142 and its hue 246°. 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 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.60:1 |
| White text | 3.74:1 |
Values
| HEX | #2789D3 |
| RGB | rgb(39, 137, 211) |
| HSL | hsl(206, 69%, 49%) |
| OKLCH | oklch(61.1% 0.142 246.5) |
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 #2789D3 | 3.74:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #2789D3 | 5.60:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #2789D3 text on white | 3.74:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #2789D3 text on black | 5.60:1 | AA | Lc -37.1 | 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
#E0ECF7
oklch(93.7% 0.02 245.6)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9CC6EC
oklch(81% 0.07 246.1)
-
Step 400
400
#63A7E2
oklch(70.7% 0.111 246.4)
-
Step 500
500 (this color)
#2789D3
oklch(61.1% 0.142 246.5)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#08456F
oklch(37.8% 0.092 245.8)
-
Step 950
950
#092841
oklch(26.9% 0.059 246.9)
#2789D3 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) | #668CD6 | 0.055 |
| Deuteranopia (no green cones) | #4D7DD2 | 0.038 |
| Tritanopia (no blue cones) | #009BA4 | 0.101 |
| Achromatopsia (no color) | #848484 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2789D3
#2789D3
oklch(61.1% 0.142 246.5)
- #B97000
#B97000
oklch(61.1% 0.136 66.2)
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 #2789D3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.016
- Dark Sky Blue #448EE4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.049
- Windows Blue #3778BF ΔE 0.050
- Blue NCS #118AB2 ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.057
- Off Blue #5684AE ΔE 0.062
Use #2789D3 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.