#2189B4
Closest named color: Blue NCS (#118AB2). oklch(59.3% 0.11 231.5), rgb(33, 137, 180).
Aa
Black text reads best on this color (5.30:1).
About this color
#2189B4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.110 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.007 away. Black text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.30:1 |
| White text | 3.96:1 |
Values
| HEX | #2189B4 |
| RGB | rgb(33, 137, 180) |
| HSL | hsl(198, 69%, 42%) |
| OKLCH | oklch(59.3% 0.11 231.5) |
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 #2189B4 | 3.96:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #2189B4 | 5.30:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #2189B4 text on white | 3.96:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #2189B4 text on black | 5.30:1 | AA | Lc -35.1 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A1C7DB
oklch(80.9% 0.049 231.1)
-
Step 400
400
#6BAACA
oklch(70.8% 0.08 231.6)
-
Step 500
500
#3D94BC
oklch(63.1% 0.102 231.5)
-
Step 600
600 (this color)
#2189B4
oklch(59.3% 0.11 231.5)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#045675
oklch(42.6% 0.085 231.9)
-
Step 900
900
#13475E
oklch(37.6% 0.066 231.8)
-
Step 950
950
#0D2A37
oklch(27% 0.042 230.5)
#2189B4 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) | #7387B6 | 0.073 |
| Deuteranopia (no green cones) | #607AB3 | 0.062 |
| Tritanopia (no blue cones) | #009598 | 0.065 |
| Achromatopsia (no color) | #808080 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2189B4
#2189B4
oklch(59.3% 0.11 231.5)
- #B1693C
#B1693C
oklch(59.2% 0.11 51.2)
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 #2189B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.007
- Steel Blue #4682B4 ΔE 0.029
- Cool Blue #4984B8 ΔE 0.030
- Teal Blue #01889F ΔE 0.035
- Off Blue #5684AE ΔE 0.039
- Water Blue #0E87CC ΔE 0.039
- Dusty Blue #5A86AD ΔE 0.042
- Nice Blue #107AB0 ΔE 0.045
Use #2189B4 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.