#156AD0
Closest named color: Royal Blue (#4169E1). oklch(53.6% 0.175 256.7), rgb(21, 106, 208).
Aa
White text reads best on this color (5.24:1).
About this color
#156AD0 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.175 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.041 away. White text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #156AD0 |
| RGB | rgb(21, 106, 208) |
| HSL | hsl(213, 82%, 45%) |
| OKLCH | oklch(53.6% 0.175 256.7) |
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 #156AD0 | 5.24:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #156AD0 | 4.00:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #156AD0 text on white | 5.24:1 | AA | Lc 75.4 | Fine for body text |
| #156AD0 text on black | 4.00:1 | AA large text | Lc -26.3 | 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
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A0C3F4
oklch(80.9% 0.079 256.8)
-
Step 400
400
#6BA2EE
oklch(70.6% 0.126 256.7)
-
Step 500
500
#4189E9
oklch(63.2% 0.162 256.6)
-
Step 600
600 (this color)
#156AD0
oklch(53.6% 0.175 256.7)
-
Step 700
700
#0E5DBA
oklch(49% 0.163 256.7)
-
Step 800
800
#114D97
oklch(42.8% 0.135 256.6)
-
Step 900
900
#174178
oklch(37.8% 0.105 256.6)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#156AD0 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) | #2A75D4 | 0.034 |
| Deuteranopia (no green cones) | #0065CE | 0.016 |
| Tritanopia (no blue cones) | #008393 | 0.132 |
| Achromatopsia (no color) | #6C6C6C | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #156AD0
#156AD0
oklch(53.6% 0.175 256.7)
- #926300
#926300
oklch(53.6% 0.112 76.4)
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 #156AD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.041
- Mid Blue #276AB3 ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.046
- Azul #1D5DEC ΔE 0.054
- Windows Blue #3778BF ΔE 0.056
- Warm Blue #4B57DB ΔE 0.060
- Neon Blue #4361EE ΔE 0.060
- French Blue #436BAD ΔE 0.062
Use #156AD0 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.