#2B4491
Closest named color: Cobalt (#1E488F). oklch(41.2% 0.131 267), rgb(43, 68, 145).
Aa
White text reads best on this color (8.98:1).
About this color
#2B4491 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.131 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 8.98:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #2B4491 |
| RGB | rgb(43, 68, 145) |
| HSL | hsl(225, 54%, 37%) |
| OKLCH | oklch(41.2% 0.131 267) |
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 #2B4491 | 8.98:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #2B4491 | 2.33:1 | Fails | Lc 13.7 | Not readable |
| #2B4491 text on white | 8.98:1 | AAA | Lc 90.3 | Preferred for body text |
| #2B4491 text on black | 2.33:1 | Fails | Lc -12.0 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F3
oklch(80.9% 0.076 266.5)
-
Step 400
400
#7E9DED
oklch(70.6% 0.123 267.1)
-
Step 500
500
#5F83E7
oklch(63.1% 0.156 267)
-
Step 600
600
#466AD5
oklch(55.5% 0.169 266.8)
-
Step 700
700
#3858B9
oklch(49.2% 0.158 266.8)
-
Step 800
800 (this color)
#2B4491
oklch(41.2% 0.131 267)
-
Step 900
900
#293D77
oklch(37.6% 0.102 267.1)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#2B4491 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) | #134E94 | 0.030 |
| Deuteranopia (no green cones) | #00458F | 0.029 |
| Tritanopia (no blue cones) | #005664 | 0.105 |
| Achromatopsia (no color) | #494949 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4491
#2B4491
oklch(41.2% 0.131 267)
- #5F4700
#5F4700
oklch(41.2% 0.084 86.4)
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 #2B4491, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Blueberry #464196 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.043
- Dusk Blue #26538D ΔE 0.043
- Light Navy #155084 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.049
- Sapphire #2138AB ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.059
Use #2B4491 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.