#2B4BB9
Closest named color: Blue Blue (#2242C7). oklch(46% 0.178 266.7), rgb(43, 75, 185).
Aa
White text reads best on this color (7.47:1).
About this color
#2B4BB9 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.178 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.032 away. White text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.80:1 |
| White text | 7.47:1 |
Values
| HEX | #2B4BB9 |
| RGB | rgb(43, 75, 185) |
| HSL | hsl(226, 62%, 45%) |
| OKLCH | oklch(46% 0.178 266.7) |
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 #2B4BB9 | 7.47:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #2B4BB9 | 2.80:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #2B4BB9 text on white | 7.47:1 | AAA | Lc 85.4 | Fine for body text |
| #2B4BB9 text on black | 2.80:1 | Fails | Lc -16.6 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A7C0F9
oklch(80.9% 0.086 266.1)
-
Step 400
400
#799DF6
oklch(70.8% 0.137 266.3)
-
Step 500
500
#5981F2
oklch(63.1% 0.175 266.7)
-
Step 600
600
#4067E1
oklch(55.5% 0.191 266.7)
-
Step 700
700 (this color)
#2B4BB9
oklch(46% 0.178 266.7)
-
Step 800
800
#2A469E
oklch(42.6% 0.147 266.7)
-
Step 900
900
#263C7E
oklch(37.7% 0.115 266.9)
-
Step 950
950
#16244A
oklch(27.1% 0.073 266.4)
#2B4BB9 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) | #005CBD | 0.043 |
| Deuteranopia (no green cones) | #004EB7 | 0.024 |
| Tritanopia (no blue cones) | #00677A | 0.141 |
| Achromatopsia (no color) | #555555 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4BB9
#2B4BB9
oklch(46% 0.178 266.7)
- #6F5300
#6F5300
oklch(45.9% 0.094 85.9)
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 #2B4BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.032
- Majorelle Blue #3F37C9 ΔE 0.050
- Sapphire #2138AB ΔE 0.053
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Blueberry #464196 ΔE 0.066
- Blurple #5539CC ΔE 0.068
- Cobalt #1E488F ΔE 0.070
- Warm Blue #4B57DB ΔE 0.074
Use #2B4BB9 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.