#2B55B8
Closest named color: Blue Blue (#2242C7). oklch(47.9% 0.164 263.9), rgb(43, 85, 184).
Aa
White text reads best on this color (6.78:1).
About this color
#2B55B8 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.164 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.053 away. White text reads best on it, at 6.78:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #2B55B8 |
| RGB | rgb(43, 85, 184) |
| HSL | hsl(222, 62%, 45%) |
| OKLCH | oklch(47.9% 0.164 263.9) |
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 #2B55B8 | 6.78:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #2B55B8 | 3.09:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #2B55B8 text on white | 6.78:1 | AA | Lc 82.9 | Fine for body text |
| #2B55B8 text on black | 3.09:1 | AA large text | Lc -19.0 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A7C1F5
oklch(81% 0.079 264)
-
Step 400
400
#789FF0
oklch(70.8% 0.127 263.9)
-
Step 500
500
#5684EA
oklch(63% 0.162 264.1)
-
Step 600
600
#3C6BD9
oklch(55.6% 0.177 264.1)
-
Step 700
700 (this color)
#2B55B8
oklch(47.9% 0.164 263.9)
-
Step 800
800
#274998
oklch(42.7% 0.136 264)
-
Step 900
900
#243E79
oklch(37.7% 0.106 264.1)
-
Step 950
950
#152547
oklch(27.1% 0.067 263.6)
#2B55B8 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) | #0462BB | 0.035 |
| Deuteranopia (no green cones) | #0055B6 | 0.022 |
| Tritanopia (no blue cones) | #006D7E | 0.129 |
| Achromatopsia (no color) | #5B5B5B | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B55B8
#2B55B8
oklch(47.9% 0.164 263.9)
- #775700
#775700
oklch(47.8% 0.098 83.7)
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 #2B55B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.053
- Mid Blue #276AB3 ΔE 0.058
- Warm Blue #4B57DB ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.067
- Dusk Blue #26538D ΔE 0.070
- Majorelle Blue #3F37C9 ΔE 0.070
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- French Blue #436BAD ΔE 0.072
Use #2B55B8 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.