#1784D2
Closest named color: Water Blue (#0E87CC). oklch(59.6% 0.149 247), rgb(23, 132, 210).
Aa
Black text reads best on this color (5.26:1).
About this color
#1784D2 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.149 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.014 away. Black text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.26:1 |
| White text | 3.98:1 |
Values
| HEX | #1784D2 |
| RGB | rgb(23, 132, 210) |
| HSL | hsl(205, 80%, 46%) |
| OKLCH | oklch(59.6% 0.149 247) |
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 #1784D2 | 3.98:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #1784D2 | 5.26:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #1784D2 text on white | 3.98:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #1784D2 text on black | 5.26:1 | AA | Lc -35.0 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DCF3
oklch(88.4% 0.041 247.1)
-
Step 300
300
#9BC6EE
oklch(81% 0.073 246.9)
-
Step 400
400
#60A7E5
oklch(70.8% 0.116 246.7)
-
Step 500
500 (this color)
#1784D2
oklch(59.6% 0.149 247)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#034472
oklch(37.6% 0.098 247.4)
-
Step 950
950
#072843
oklch(26.9% 0.063 247.7)
#1784D2 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) | #5E88D5 | 0.055 |
| Deuteranopia (no green cones) | #4278D1 | 0.037 |
| Tritanopia (no blue cones) | #0097A1 | 0.105 |
| Achromatopsia (no color) | #7F7F7F | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1784D2
#1784D2
oklch(59.6% 0.149 247)
- #B26D00
#B26D00
oklch(59.6% 0.132 67.2)
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 #1784D2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.014
- Windows Blue #3778BF ΔE 0.040
- Cool Blue #4984B8 ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.048
- Steel Blue #4682B4 ΔE 0.050
- Nice Blue #107AB0 ΔE 0.056
- Blue NCS #118AB2 ΔE 0.057
- Off Blue #5684AE ΔE 0.067
Use #1784D2 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.