#2155C7
Closest named color: Blue Blue (#2242C7). oklch(48.8% 0.186 262.9), rgb(33, 85, 199).
Aa
White text reads best on this color (6.58:1).
About this color
#2155C7 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.186 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.043 away. White text reads best on it, at 6.58:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.18:1 |
| White text | 6.58:1 |
Values
| HEX | #2155C7 |
| RGB | rgb(33, 85, 199) |
| HSL | hsl(221, 72%, 45%) |
| OKLCH | oklch(48.8% 0.186 262.9) |
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 #2155C7 | 6.58:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #2155C7 | 3.18:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #2155C7 text on white | 6.58:1 | AA | Lc 81.9 | Fine for body text |
| #2155C7 text on black | 3.18:1 | AA large text | Lc -20.0 | 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
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#709EFA
oklch(70.7% 0.144 263.1)
-
Step 500
500
#4B83F7
oklch(63.2% 0.184 262.9)
-
Step 600
600
#2F69E6
oklch(55.7% 0.2 262.9)
-
Step 700
700 (this color)
#2155C7
oklch(48.8% 0.186 262.9)
-
Step 800
800
#1D47A2
oklch(42.7% 0.155 262.9)
-
Step 900
900
#1D3D80
oklch(37.7% 0.12 262.8)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#2155C7 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) | #0065CB | 0.040 |
| Deuteranopia (no green cones) | #0056C5 | 0.014 |
| Tritanopia (no blue cones) | #007285 | 0.145 |
| Achromatopsia (no color) | #5D5D5D | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2155C7
#2155C7
oklch(48.8% 0.186 262.9)
- #7B5900
#7B5900
oklch(48.7% 0.1 82.7)
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 #2155C7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.043
- Warm Blue #4B57DB ΔE 0.054
- Azul #1D5DEC ΔE 0.060
- Majorelle Blue #3F37C9 ΔE 0.065
- Mid Blue #276AB3 ΔE 0.068
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Royal Blue #4169E1 ΔE 0.073
- Neon Blue #4361EE ΔE 0.077
Use #2155C7 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.