#2B488F
Closest named color: Cobalt (#1E488F). oklch(42% 0.123 264.9), rgb(43, 72, 143).
Aa
White text reads best on this color (8.65:1).
About this color
#2B488F is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.123 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.012 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #2B488F |
| RGB | rgb(43, 72, 143) |
| HSL | hsl(223, 54%, 36%) |
| OKLCH | oklch(42% 0.123 264.9) |
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 #2B488F | 8.65:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #2B488F | 2.42:1 | Fails | Lc 14.6 | Not readable |
| #2B488F text on white | 8.65:1 | AAA | Lc 89.4 | Fine for body text |
| #2B488F text on black | 2.42:1 | Fails | Lc -12.8 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCD9F4
oklch(88.4% 0.04 265.1)
-
Step 300
300
#AAC1F0
oklch(81% 0.071 264.4)
-
Step 400
400
#7D9FE8
oklch(70.7% 0.114 264.6)
-
Step 500
500
#5D85E2
oklch(63.1% 0.147 265)
-
Step 600
600
#446DCF
oklch(55.7% 0.158 264.7)
-
Step 700
700
#365AB4
oklch(49.1% 0.149 265)
-
Step 800
800 (this color)
#2B488F
oklch(42% 0.123 264.9)
-
Step 900
900
#283F74
oklch(37.8% 0.095 264.6)
-
Step 950
950
#182544
oklch(27% 0.061 265.4)
#2B488F 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) | #225092 | 0.022 |
| Deuteranopia (no green cones) | #07478E | 0.026 |
| Tritanopia (no blue cones) | #005964 | 0.101 |
| Achromatopsia (no color) | #4C4C4C | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B488F
#2B488F
oklch(42% 0.123 264.9)
- #624800
#624800
oklch(41.8% 0.086 84.9)
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 #2B488F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.012
- Dusk Blue #26538D ΔE 0.032
- Light Navy #155084 ΔE 0.035
- Blueberry #464196 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.046
- Twilight Blue #0A437A ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.056
Use #2B488F 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.