#1870D4
Closest named color: Royal Blue (#4169E1). oklch(55.2% 0.173 255.7), rgb(24, 112, 212).
Aa
White text reads best on this color (4.87:1).
About this color
#1870D4 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.173 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.038 away. White text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.30:1 |
| White text | 4.87:1 |
Values
| HEX | #1870D4 |
| RGB | rgb(24, 112, 212) |
| HSL | hsl(212, 80%, 46%) |
| OKLCH | oklch(55.2% 0.173 255.7) |
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 #1870D4 | 4.87:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #1870D4 | 4.30:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #1870D4 text on white | 4.87:1 | AA | Lc 73.2 | Content text, not long reading |
| #1870D4 text on black | 4.30:1 | AA large text | Lc -28.5 | Dividers and decoration only |
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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6AA3ED
oklch(70.7% 0.125 255.5)
-
Step 500
500
#408AE7
oklch(63.2% 0.158 255.6)
-
Step 600
600 (this color)
#1870D4
oklch(55.2% 0.173 255.7)
-
Step 700
700
#095EB9
oklch(49.1% 0.161 255.8)
-
Step 800
800
#0E4D96
oklch(42.7% 0.134 255.9)
-
Step 900
900
#154177
oklch(37.7% 0.104 255.6)
-
Step 950
950
#0E2746
oklch(27.1% 0.066 255.2)
#1870D4 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) | #367AD8 | 0.035 |
| Deuteranopia (no green cones) | #006AD2 | 0.019 |
| Tritanopia (no blue cones) | #008898 | 0.129 |
| Achromatopsia (no color) | #717171 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1870D4
#1870D4
oklch(55.2% 0.173 255.7)
- #996700
#996700
oklch(55.3% 0.116 75.6)
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 #1870D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.038
- Cerulean Blue #056EEE ΔE 0.041
- Windows Blue #3778BF ΔE 0.046
- Mid Blue #276AB3 ΔE 0.051
- Azul #1D5DEC ΔE 0.061
- Neon Blue #4361EE ΔE 0.061
- French Blue #436BAD ΔE 0.064
- Water Blue #0E87CC ΔE 0.066
Use #1870D4 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.