#1684BF
Closest named color: Water Blue (#0E87CC). oklch(58.5% 0.127 239.8), rgb(22, 132, 191).
Aa
Black text reads best on this color (5.08:1).
About this color
#1684BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.127 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.020 away. Black text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.08:1 |
| White text | 4.12:1 |
Values
| HEX | #1684BF |
| RGB | rgb(22, 132, 191) |
| HSL | hsl(201, 79%, 42%) |
| OKLCH | oklch(58.5% 0.127 239.8) |
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 #1684BF | 4.12:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #1684BF | 5.08:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #1684BF text on white | 4.12:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #1684BF text on black | 5.08:1 | AA | Lc -33.8 | 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 600.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DDEC
oklch(88.6% 0.031 237.6)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#69A8D4
oklch(70.6% 0.092 240.3)
-
Step 500
500
#3992C9
oklch(63.1% 0.118 239.8)
-
Step 600
600 (this color)
#1684BF
oklch(58.5% 0.127 239.8)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#104666
oklch(37.7% 0.077 240.2)
-
Step 950
950
#0C293C
oklch(26.9% 0.049 240.9)
#1684BF 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) | #6885C2 | 0.066 |
| Deuteranopia (no green cones) | #5176BE | 0.051 |
| Tritanopia (no blue cones) | #009399 | 0.084 |
| Achromatopsia (no color) | #7D7D7D | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1684BF
#1684BF
oklch(58.5% 0.127 239.8)
- #B2671A
#B2671A
oklch(58.6% 0.128 60)
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 #1684BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.020
- Blue NCS #118AB2 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.031
- Cool Blue #4984B8 ΔE 0.032
- Nice Blue #107AB0 ΔE 0.034
- Windows Blue #3778BF ΔE 0.035
- Off Blue #5684AE ΔE 0.049
- Flat Blue #3C73A8 ΔE 0.053
Use #1684BF 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.