#156CEB
Closest named color: Cerulean Blue (#056EEE). oklch(56.1% 0.207 259.4), rgb(21, 108, 235).
Aa
White text reads best on this color (4.79:1).
About this color
#156CEB is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.207 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.007 away. White text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.37:1 |
| White text | 4.79:1 |
Values
| HEX | #156CEB |
| RGB | rgb(21, 108, 235) |
| HSL | hsl(216, 84%, 50%) |
| OKLCH | oklch(56.1% 0.207 259.4) |
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 #156CEB | 4.79:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #156CEB | 4.37:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #156CEB text on white | 4.79:1 | AA | Lc 72.5 | Content text, not long reading |
| #156CEB text on black | 4.37:1 | AA large text | Lc -29.2 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FD
oklch(80.9% 0.093 259.6)
-
Step 400
400
#66A0FC
oklch(70.7% 0.149 259.3)
-
Step 500
500
#3A85FA
oklch(63.2% 0.19 259.2)
-
Step 600
600 (this color)
#156CEB
oklch(56.1% 0.207 259.4)
-
Step 700
700
#0258CB
oklch(49.2% 0.192 259.4)
-
Step 800
800
#0949A4
oklch(42.8% 0.159 259.3)
-
Step 900
900
#123E82
oklch(37.7% 0.124 259.3)
-
Step 950
950
#0C254C
oklch(27% 0.079 259.2)
#156CEB 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) | #007CEF | 0.040 |
| Deuteranopia (no green cones) | #0069E9 | 0.011 |
| Tritanopia (no blue cones) | #008CA1 | 0.158 |
| Achromatopsia (no color) | #727272 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #156CEB
#156CEB
oklch(56.1% 0.207 259.4)
- #986B00
#986B00
oklch(56% 0.116 79.5)
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 #156CEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.007
- Royal Blue #4169E1 ΔE 0.031
- Bright Blue #0165FC ΔE 0.031
- Azul #1D5DEC ΔE 0.035
- Neon Blue #4361EE ΔE 0.036
- Clear Blue #247AFD ΔE 0.045
- Warm Blue #4B57DB ΔE 0.061
- Electric Blue #0652FF ΔE 0.065
Use #156CEB 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.