#2B4E88
Closest named color: Dusk Blue (#26538D). oklch(42.8% 0.105 259.9), rgb(43, 78, 136).
Aa
White text reads best on this color (8.24:1).
About this color
#2B4E88 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.105 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.015 away. White text reads best on it, at 8.24:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.54:1 |
| White text | 8.24:1 |
Values
| HEX | #2B4E88 |
| RGB | rgb(43, 78, 136) |
| HSL | hsl(217, 52%, 35%) |
| OKLCH | oklch(42.8% 0.105 259.9) |
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 #2B4E88 | 8.24:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #2B4E88 | 2.54:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #2B4E88 text on white | 8.24:1 | AAA | Lc 88.2 | Fine for body text |
| #2B4E88 text on black | 2.54:1 | Fails | Lc -13.9 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#AAC2E9
oklch(80.9% 0.061 260.1)
-
Step 400
400
#7CA1DE
oklch(70.6% 0.099 260.1)
-
Step 500
500
#5B89D5
oklch(63.1% 0.126 260)
-
Step 600
600
#4171C2
oklch(55.5% 0.137 260.2)
-
Step 700
700
#335FA7
oklch(49.2% 0.125 259.8)
-
Step 800
800 (this color)
#2B4E88
oklch(42.8% 0.105 259.9)
-
Step 900
900
#27416C
oklch(37.7% 0.081 260)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#2B4E88 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) | #33538A | 0.018 |
| Deuteranopia (no green cones) | #254B87 | 0.011 |
| Tritanopia (no blue cones) | #005B64 | 0.085 |
| Achromatopsia (no color) | #4F4F4F | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4E88
#2B4E88
oklch(42.8% 0.105 259.9)
- #694900
#694900
oklch(43% 0.089 79.8)
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 #2B4E88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.015
- Light Navy #155084 ΔE 0.019
- Cobalt #1E488F ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.046
- Twilight #4E518B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.049
Use #2B4E88 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.