#2189D3
Closest named color: Water Blue (#0E87CC). oklch(61% 0.144 245.7), rgb(33, 137, 211).
Aa
Black text reads best on this color (5.58:1).
About this color
#2189D3 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.144 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.014 away. Black text reads best on it, at 5.58:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.58:1 |
| White text | 3.76:1 |
Values
| HEX | #2189D3 |
| RGB | rgb(33, 137, 211) |
| HSL | hsl(205, 73%, 48%) |
| OKLCH | oklch(61% 0.144 245.7) |
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 #2189D3 | 3.76:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #2189D3 | 5.58:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #2189D3 text on white | 3.76:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #2189D3 text on black | 5.58:1 | AA | Lc -37.0 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9BC6EC
oklch(80.9% 0.071 245.5)
-
Step 400
400
#61A7E2
oklch(70.7% 0.112 245.7)
-
Step 500
500 (this color)
#2189D3
oklch(61% 0.144 245.7)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#044570
oklch(37.8% 0.094 245.6)
-
Step 950
950
#082941
oklch(27.1% 0.058 244.7)
#2189D3 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 | 0.057 |
| Deuteranopia (no green cones) | #4C7DD2 | 0.039 |
| Tritanopia (no blue cones) | #009BA4 | 0.101 |
| Achromatopsia (no color) | #848484 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2189D3
#2189D3
oklch(61% 0.144 245.7)
- #B96F00
#B96F00
oklch(60.9% 0.136 65.5)
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 #2189D3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.014
- Dark Sky Blue #448EE4 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.049
- Windows Blue #3778BF ΔE 0.050
- Blue NCS #118AB2 ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.059
- Off Blue #5684AE ΔE 0.063
Use #2189D3 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.