#2155CA
Closest named color: Blue Blue (#2242C7). oklch(49% 0.19 263.1), rgb(33, 85, 202).
Aa
White text reads best on this color (6.52:1).
About this color
#2155CA 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 0.044 away. White text reads best on it, at 6.52:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.21:1 |
| White text | 6.52:1 |
Values
| HEX | #2155CA |
| RGB | rgb(33, 85, 202) |
| HSL | hsl(222, 72%, 46%) |
| OKLCH | oklch(49% 0.19 263.1) |
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 #2155CA | 6.52:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #2155CA | 3.21:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #2155CA text on white | 6.52:1 | AA | Lc 81.7 | Fine for body text |
| #2155CA text on black | 3.21:1 | AA large text | Lc -20.2 | 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 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
#4A82FA
oklch(63.1% 0.189 263.2)
-
Step 600
600
#2E68E9
oklch(55.7% 0.205 263.1)
-
Step 700
700 (this color)
#2155CA
oklch(49% 0.19 263.1)
-
Step 800
800
#1D47A3
oklch(42.7% 0.156 263)
-
Step 900
900
#1D3D82
oklch(37.9% 0.123 263.1)
-
Step 950
950
#11244C
oklch(27% 0.078 263.1)
#2155CA 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) | #0066CE | 0.042 |
| Deuteranopia (no green cones) | #0056C8 | 0.014 |
| Tritanopia (no blue cones) | #007387 | 0.147 |
| Achromatopsia (no color) | #5E5E5E | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2155CA
#2155CA
oklch(49% 0.19 263.1)
- #7C5A00
#7C5A00
oklch(49% 0.101 82.9)
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 #2155CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.044
- Warm Blue #4B57DB ΔE 0.051
- Azul #1D5DEC ΔE 0.056
- Majorelle Blue #3F37C9 ΔE 0.064
- Mid Blue #276AB3 ΔE 0.070
- Royal Blue #4169E1 ΔE 0.071
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
- Neon Blue #4361EE ΔE 0.073
Use #2155CA 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.