#2156CB
Closest named color: Blue Blue (#2242C7). oklch(49.3% 0.19 263), rgb(33, 86, 203).
Aa
White text reads best on this color (6.44:1).
About this color
#2156CB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.190 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.046 away. White text reads best on it, at 6.44:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #2156CB |
| RGB | rgb(33, 86, 203) |
| HSL | hsl(221, 72%, 46%) |
| OKLCH | oklch(49.3% 0.19 263) |
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 #2156CB | 6.44:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #2156CB | 3.25:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #2156CB text on white | 6.44:1 | AA | Lc 81.3 | Fine for body text |
| #2156CB text on black | 3.25:1 | AA large text | Lc -20.5 | 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 700.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFC
oklch(88.6% 0.051 263.2)
-
Step 300
300
#A1C1FD
oklch(80.9% 0.092 262.7)
-
Step 400
400
#6F9EFC
oklch(70.7% 0.147 263)
-
Step 500
500
#4982FA
oklch(63.1% 0.189 263)
-
Step 600
600
#2D68E9
oklch(55.7% 0.205 263)
-
Step 700
700 (this color)
#2156CB
oklch(49.3% 0.19 263)
-
Step 800
800
#1C47A4
oklch(42.8% 0.158 262.9)
-
Step 900
900
#1C3D82
oklch(37.8% 0.123 262.8)
-
Step 950
950
#11244C
oklch(27% 0.078 263.1)
#2156CB 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) | #0066CF | 0.039 |
| Deuteranopia (no green cones) | #0057C9 | 0.014 |
| Tritanopia (no blue cones) | #007488 | 0.147 |
| Achromatopsia (no color) | #5E5E5E | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2156CB
#2156CB
oklch(49.3% 0.19 263)
- #7D5B00
#7D5B00
oklch(49.4% 0.101 83.2)
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 #2156CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.046
- Warm Blue #4B57DB ΔE 0.050
- Azul #1D5DEC ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.066
- Royal Blue #4169E1 ΔE 0.068
- Mid Blue #276AB3 ΔE 0.069
- Neon Blue #4361EE ΔE 0.070
- Blue With A Hint Of Purple #533CC6 ΔE 0.073
Use #2156CB 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.