#2B4AB0
Closest named color: Blue Blue (#2242C7). oklch(45% 0.167 266.6), rgb(43, 74, 176).
Aa
White text reads best on this color (7.75:1).
About this color
#2B4AB0 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.167 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.042 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #2B4AB0 |
| RGB | rgb(43, 74, 176) |
| HSL | hsl(226, 61%, 43%) |
| OKLCH | oklch(45% 0.167 266.6) |
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 #2B4AB0 | 7.75:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #2B4AB0 | 2.70:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #2B4AB0 text on white | 7.75:1 | AAA | Lc 86.4 | Fine for body text |
| #2B4AB0 text on black | 2.70:1 | Fails | Lc -15.7 | 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 800.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#3A63EF
oklch(55.6% 0.215 266.6)
-
Step 700
700
#2D50D0
oklch(49% 0.201 266.7)
-
Step 800
800 (this color)
#2B4AB0
oklch(45% 0.167 266.6)
-
Step 900
900
#223A85
oklch(37.7% 0.129 266.7)
-
Step 950
950
#14234E
oklch(27.1% 0.082 266.5)
#2B4AB0 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) | #0059B3 | 0.040 |
| Deuteranopia (no green cones) | #004DAE | 0.024 |
| Tritanopia (no blue cones) | #006375 | 0.132 |
| Achromatopsia (no color) | #535353 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4AB0
#2B4AB0
oklch(45% 0.167 266.6)
- #6B5100
#6B5100
oklch(45% 0.092 87.1)
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 #2B4AB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.042
- Sapphire #2138AB ΔE 0.046
- Blueberry #464196 ΔE 0.055
- Cobalt #1E488F ΔE 0.056
- Majorelle Blue #3F37C9 ΔE 0.057
- Dusk Blue #26538D ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.073
Use #2B4AB0 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.