#1B489F
Closest named color: Cobalt (#1E488F). oklch(42.6% 0.15 261.8), rgb(27, 72, 159).
Aa
White text reads best on this color (8.48:1).
About this color
#1B489F is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.150 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 8.48:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.47:1 |
| White text | 8.48:1 |
Values
| HEX | #1B489F |
| RGB | rgb(27, 72, 159) |
| HSL | hsl(220, 71%, 36%) |
| OKLCH | oklch(42.6% 0.15 261.8) |
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 #1B489F | 8.48:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #1B489F | 2.47:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #1B489F text on white | 8.48:1 | AAA | Lc 88.7 | Fine for body text |
| #1B489F text on black | 2.47:1 | Fails | Lc -13.5 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A2C1FA
oklch(80.9% 0.088 262.4)
-
Step 400
400
#6F9FF8
oklch(70.7% 0.141 261.9)
-
Step 500
500
#4984F4
oklch(63.1% 0.179 261.8)
-
Step 600
600
#2C6AE3
oklch(55.6% 0.195 261.9)
-
Step 700
700
#1F58C5
oklch(49.2% 0.181 261.7)
-
Step 800
800 (this color)
#1B489F
oklch(42.6% 0.15 261.8)
-
Step 900
900
#1C3E7F
oklch(37.8% 0.117 261.8)
-
Step 950
950
#11254A
oklch(27.1% 0.074 261.5)
#1B489F 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) | #0053A2 | 0.029 |
| Deuteranopia (no green cones) | #00479D | 0.014 |
| Tritanopia (no blue cones) | #005D6C | 0.115 |
| Achromatopsia (no color) | #4D4D4D | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B489F
#1B489F
oklch(42.6% 0.15 261.8)
- #664900
#664900
oklch(42.6% 0.088 82.4)
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 #1B489F, closest first.
No curated palette has a color within ΔE 0.04 of #1B489F.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Sapphire #2138AB ΔE 0.043
- Dusk Blue #26538D ΔE 0.047
- Blueberry #464196 ΔE 0.052
- Light Navy #155084 ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.064
- Twilight Blue #0A437A ΔE 0.064
Use #1B489F 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.