#2B4396
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.139 267.7), rgb(43, 67, 150).
Aa
White text reads best on this color (8.95:1).
About this color
#2B4396 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.139 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.95:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.34:1 |
| White text | 8.95:1 |
Values
| HEX | #2B4396 |
| RGB | rgb(43, 67, 150) |
| HSL | hsl(227, 55%, 38%) |
| OKLCH | oklch(41.4% 0.139 267.7) |
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 #2B4396 | 8.95:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #2B4396 | 2.34:1 | Fails | Lc 13.8 | Not readable |
| #2B4396 text on white | 8.95:1 | AAA | Lc 90.1 | Preferred for body text |
| #2B4396 text on black | 2.34:1 | 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
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#AABFF6
oklch(80.8% 0.082 268.3)
-
Step 400
400
#7D9DF2
oklch(70.8% 0.13 267.4)
-
Step 500
500
#5E81ED
oklch(63% 0.167 267.9)
-
Step 600
600
#4668DC
oklch(55.7% 0.181 267.8)
-
Step 700
700
#3856BF
oklch(49.2% 0.168 267.7)
-
Step 800
800 (this color)
#2B4396
oklch(41.4% 0.139 267.7)
-
Step 900
900
#293C7B
oklch(37.7% 0.11 268.2)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#2B4396 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) | #014E99 | 0.035 |
| Deuteranopia (no green cones) | #004594 | 0.028 |
| Tritanopia (no blue cones) | #005766 | 0.112 |
| Achromatopsia (no color) | #494949 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4396
#2B4396
oklch(41.4% 0.139 267.7)
- #5F4800
#5F4800
oklch(41.5% 0.085 87.6)
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 #2B4396, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Blueberry #464196 ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.044
- Sapphire #2138AB ΔE 0.046
- Dusk Blue #26538D ΔE 0.049
- Light Navy #155084 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.065
Use #2B4396 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.