#2B4FA7
Closest named color: Cobalt (#1E488F). oklch(45.3% 0.148 264.5), rgb(43, 79, 167).
Aa
White text reads best on this color (7.55:1).
About this color
#2B4FA7 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.148 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.045 away. White text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.77:1 |
| White text | 7.55:1 |
Values
| HEX | #2B4FA7 |
| RGB | rgb(43, 79, 167) |
| HSL | hsl(223, 59%, 41%) |
| OKLCH | oklch(45.3% 0.148 264.5) |
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 #2B4FA7 | 7.55:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #2B4FA7 | 2.77:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #2B4FA7 text on white | 7.55:1 | AAA | Lc 85.8 | Fine for body text |
| #2B4FA7 text on black | 2.77:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F2F6FE
oklch(97.2% 0.012 264.5)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#C9D9FA
oklch(88.4% 0.049 264.9)
-
Step 300
300
#A5C0F9
oklch(80.8% 0.086 264.8)
-
Step 400
400
#759EF7
oklch(70.8% 0.138 264.4)
-
Step 500
500
#5282F3
oklch(63% 0.177 264.5)
-
Step 600
600
#3869E2
oklch(55.7% 0.192 264.4)
-
Step 700
700
#2B56C4
oklch(49% 0.179 264.5)
-
Step 800
800 (this color)
#2B4FA7
oklch(45.3% 0.148 264.5)
-
Step 900
900
#223D7E
oklch(37.8% 0.115 264.5)
-
Step 950
950
#14244A
oklch(27% 0.074 264.7)
#2B4FA7 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) | #145AAA | 0.030 |
| Deuteranopia (no green cones) | #004FA5 | 0.025 |
| Tritanopia (no blue cones) | #006473 | 0.117 |
| Achromatopsia (no color) | #545454 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4FA7
#2B4FA7
oklch(45.3% 0.148 264.5)
- #6E5100
#6E5100
oklch(45.3% 0.093 84.6)
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 #2B4FA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.045
- Dusk Blue #26538D ΔE 0.046
- Blueberry #464196 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.055
- Sapphire #2138AB ΔE 0.059
- Blue Blue #2242C7 ΔE 0.061
- Light Navy #155084 ΔE 0.062
- Twilight #4E518B ΔE 0.063
Use #2B4FA7 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.