#1B89CC
Closest named color: Water Blue (#0E87CC). oklch(60.5% 0.137 242.6), rgb(27, 137, 204).
Aa
Black text reads best on this color (5.49:1).
About this color
#1B89CC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.137 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.007 away. Black text reads best on it, at 5.49:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.49:1 |
| White text | 3.82:1 |
Values
| HEX | #1B89CC |
| RGB | rgb(27, 137, 204) |
| HSL | hsl(203, 77%, 45%) |
| OKLCH | oklch(60.5% 0.137 242.6) |
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 #1B89CC | 3.82:1 | AA large text | Lc -70.7 | Content text, not long reading |
| Black text on #1B89CC | 5.49:1 | AA | Lc 38.9 | Non-text elements, placeholder text |
| #1B89CC text on white | 3.82:1 | AA large text | Lc 65.2 | Content text, not long reading |
| #1B89CC text on black | 5.49:1 | AA | Lc -36.5 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDF0
oklch(88.6% 0.037 241.8)
-
Step 300
300
#9BC6E9
oklch(80.8% 0.067 243.3)
-
Step 400
400
#60A8DE
oklch(70.6% 0.108 242.7)
-
Step 500
500 (this color)
#1B89CC
oklch(60.5% 0.137 242.6)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#02466D
oklch(37.8% 0.089 242.5)
-
Step 950
950
#072940
oklch(27% 0.057 243.1)
#1B89CC 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) | #698BCF | 0.063 |
| Deuteranopia (no green cones) | #517CCB | 0.046 |
| Tritanopia (no blue cones) | #009AA1 | 0.094 |
| Achromatopsia (no color) | #828282 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B89CC
#1B89CC
oklch(60.5% 0.137 242.6)
- #BA6C06
#BA6C06
oklch(60.5% 0.137 62.6)
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 #1B89CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.007
- Cool Blue #4984B8 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.042
- Blue NCS #118AB2 ΔE 0.042
- Windows Blue #3778BF ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.047
- Off Blue #5684AE ΔE 0.056
- Nice Blue #107AB0 ΔE 0.056
Use #1B89CC 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.