#1B84CF
Closest named color: Water Blue (#0E87CC). oklch(59.5% 0.145 246.4), rgb(27, 132, 207).
Aa
Black text reads best on this color (5.24:1).
About this color
#1B84CF is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.145 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.011 away. Black text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #1B84CF |
| RGB | rgb(27, 132, 207) |
| HSL | hsl(205, 77%, 46%) |
| OKLCH | oklch(59.5% 0.145 246.4) |
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 #1B84CF | 4.00:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #1B84CF | 5.24:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #1B84CF text on white | 4.00:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #1B84CF text on black | 5.24:1 | AA | Lc -34.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
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
#9CC6EC
oklch(81% 0.07 246.1)
-
Step 400
400
#61A7E3
oklch(70.7% 0.113 246.2)
-
Step 500
500 (this color)
#1B84CF
oklch(59.5% 0.145 246.4)
-
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
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#054570
oklch(37.8% 0.094 245.8)
-
Step 950
950
#082842
oklch(26.9% 0.061 247.3)
#1B84CF 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) | #6088D2 | 0.056 |
| Deuteranopia (no green cones) | #4578CE | 0.038 |
| Tritanopia (no blue cones) | #0096A0 | 0.101 |
| Achromatopsia (no color) | #7F7F7F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B84CF
#1B84CF
oklch(59.5% 0.145 246.4)
- #B26C00
#B26C00
oklch(59.5% 0.132 66.5)
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 #1B84CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.011
- Windows Blue #3778BF ΔE 0.037
- Cool Blue #4984B8 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.050
- Blue NCS #118AB2 ΔE 0.052
- Nice Blue #107AB0 ΔE 0.053
- Off Blue #5684AE ΔE 0.063
Use #1B84CF 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.