#2B4F8C
Closest named color: Dusk Blue (#26538D). oklch(43.3% 0.109 260.3), rgb(43, 79, 140).
Aa
White text reads best on this color (8.07:1).
About this color
#2B4F8C is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.109 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.012 away. White text reads best on it, at 8.07:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.59:1 |
| White text | 8.07:1 |
Values
| HEX | #2B4F8C |
| RGB | rgb(43, 79, 140) |
| HSL | hsl(218, 53%, 36%) |
| OKLCH | oklch(43.3% 0.109 260.3) |
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 #2B4F8C | 8.07:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #2B4F8C | 2.59:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #2B4F8C text on white | 8.07:1 | AAA | Lc 87.7 | Fine for body text |
| #2B4F8C text on black | 2.59:1 | Fails | Lc -14.4 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#A9C2EB
oklch(80.9% 0.064 260.3)
-
Step 400
400
#7BA1E0
oklch(70.6% 0.102 260.2)
-
Step 500
500
#5989D8
oklch(63.2% 0.131 259.9)
-
Step 600
600
#3F71C5
oklch(55.6% 0.142 260.1)
-
Step 700
700
#315EAA
oklch(49.1% 0.132 260.2)
-
Step 800
800 (this color)
#2B4F8C
oklch(43.3% 0.109 260.3)
-
Step 900
900
#26416E
oklch(37.8% 0.084 260.1)
-
Step 950
950
#162641
oklch(27% 0.055 260.3)
#2B4F8C 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) | #32558E | 0.020 |
| Deuteranopia (no green cones) | #224C8B | 0.013 |
| Tritanopia (no blue cones) | #005D66 | 0.089 |
| Achromatopsia (no color) | #505050 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4F8C
#2B4F8C
oklch(43.3% 0.109 260.3)
- #6A4A00
#6A4A00
oklch(43.3% 0.09 80.2)
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 #2B4F8C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.012
- Light Navy #155084 ΔE 0.023
- Cobalt #1E488F ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.042
- Twilight #4E518B ΔE 0.046
- Dusk #4E5481 ΔE 0.052
Use #2B4F8C 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.