#1B84DD
Closest named color: Water Blue (#0E87CC). oklch(60.3% 0.162 250.3), rgb(27, 132, 221).
Aa
Black text reads best on this color (5.39:1).
About this color
#1B84DD is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.162 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.029 away. Black text reads best on it, at 5.39:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #1B84DD |
| RGB | rgb(27, 132, 221) |
| HSL | hsl(208, 78%, 49%) |
| OKLCH | oklch(60.3% 0.162 250.3) |
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 #1B84DD | 3.89:1 | AA large text | Lc -71.3 | Content text, not long reading |
| Black text on #1B84DD | 5.39:1 | AA | Lc 38.3 | Non-text elements, placeholder text |
| #1B84DD text on white | 3.89:1 | AA large text | Lc 65.8 | Content text, not long reading |
| #1B84DD text on black | 5.39:1 | AA | Lc -35.8 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9AC5F2
oklch(80.9% 0.079 250)
-
Step 400
400
#5FA5EC
oklch(70.6% 0.127 250.4)
-
Step 500
500 (this color)
#1B84DD
oklch(60.3% 0.162 250.3)
-
Step 600
600
#0075CB
oklch(55.5% 0.159 250.4)
-
Step 700
700
#0062AC
oklch(49% 0.141 250.5)
-
Step 800
800
#00508E
oklch(42.6% 0.122 250.5)
-
Step 900
900
#034377
oklch(37.7% 0.106 250.4)
-
Step 950
950
#072845
oklch(27.1% 0.066 249.3)
#1B84DD 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) | #578AE1 | 0.048 |
| Deuteranopia (no green cones) | #3779DB | 0.030 |
| Tritanopia (no blue cones) | #0099A6 | 0.116 |
| Achromatopsia (no color) | #818181 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B84DD
#1B84DD
oklch(60.3% 0.162 250.3)
- #B27100
#B27100
oklch(60.4% 0.131 70.1)
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 #1B84DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.040
- Windows Blue #3778BF ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.057
- Clear Blue #247AFD ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.061
- Cool Blue #4984B8 ΔE 0.061
- Soft Blue #6488EA ΔE 0.063
Use #1B84DD 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.