#2B4393
Closest named color: Cobalt (#1E488F). oklch(41.2% 0.135 267.5), rgb(43, 67, 147).
Aa
White text reads best on this color (9.02:1).
About this color
#2B4393 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.135 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.019 away. White text reads best on it, at 9.02:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #2B4393 |
| RGB | rgb(43, 67, 147) |
| HSL | hsl(226, 55%, 37%) |
| OKLCH | oklch(41.2% 0.135 267.5) |
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 #2B4393 | 9.02:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #2B4393 | 2.32:1 | Fails | Lc 13.6 | Not readable |
| #2B4393 text on white | 9.02:1 | AAA | Lc 90.4 | Preferred for body text |
| #2B4393 text on black | 2.32:1 | Fails | Lc -11.9 | 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
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F5
oklch(81% 0.079 267.1)
-
Step 400
400
#7E9DEF
oklch(70.7% 0.126 267.4)
-
Step 500
500
#5F82EA
oklch(63.1% 0.161 267.6)
-
Step 600
600
#4769D8
oklch(55.6% 0.174 267.6)
-
Step 700
700
#3957BC
oklch(49.2% 0.163 267.6)
-
Step 800
800 (this color)
#2B4393
oklch(41.2% 0.135 267.5)
-
Step 900
900
#293D79
oklch(37.8% 0.105 267.4)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#2B4393 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) | #0A4E96 | 0.034 |
| Deuteranopia (no green cones) | #004491 | 0.029 |
| Tritanopia (no blue cones) | #005664 | 0.110 |
| Achromatopsia (no color) | #494949 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4393
#2B4393
oklch(41.2% 0.135 267.5)
- #5E4700
#5E4700
oklch(41.1% 0.084 87.4)
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 #2B4393, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.019
- Blueberry #464196 ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.043
- Dusk Blue #26538D ΔE 0.047
- Light Navy #155084 ΔE 0.049
- Sapphire #2138AB ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.063
Use #2B4393 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.