#2B4298
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.143 268.2), rgb(43, 66, 152).
Aa
White text reads best on this color (8.99:1).
About this color
#2B4298 is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.143 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.025 away. White text reads best on it, at 8.99:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 8.99:1 |
Values
| HEX | #2B4298 |
| RGB | rgb(43, 66, 152) |
| HSL | hsl(227, 56%, 38%) |
| OKLCH | oklch(41.4% 0.143 268.2) |
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 #2B4298 | 8.99:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #2B4298 | 2.33:1 | Fails | Lc 13.7 | Not readable |
| #2B4298 text on white | 8.99:1 | AAA | Lc 90.2 | Preferred for body text |
| #2B4298 text on black | 2.33:1 | Fails | Lc -12.1 | Not readable |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#A9BFF8
oklch(80.8% 0.085 268.1)
-
Step 400
400
#7D9CF4
oklch(70.7% 0.134 268.2)
-
Step 500
500
#5E80F0
oklch(63% 0.172 268.4)
-
Step 600
600
#4667DF
oklch(55.7% 0.187 268.2)
-
Step 700
700
#3855C1
oklch(49.2% 0.172 268.1)
-
Step 800
800 (this color)
#2B4298
oklch(41.4% 0.143 268.2)
-
Step 900
900
#293C7C
oklch(37.8% 0.111 268.3)
-
Step 950
950
#182449
oklch(27.2% 0.071 268)
#2B4298 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) | #004E9B | 0.037 |
| Deuteranopia (no green cones) | #004496 | 0.029 |
| Tritanopia (no blue cones) | #005766 | 0.116 |
| Achromatopsia (no color) | #494949 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4298
#2B4298
oklch(41.4% 0.143 268.2)
- #5E4800
#5E4800
oklch(41.3% 0.084 88.6)
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 #2B4298, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Blueberry #464196 ΔE 0.037
- Sapphire #2138AB ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.046
- Dusk Blue #26538D ΔE 0.052
- Light Navy #155084 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.069
Use #2B4298 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.