#1B489D
Closest named color: Cobalt (#1E488F). oklch(42.4% 0.147 261.6), rgb(27, 72, 157).
Aa
White text reads best on this color (8.53:1).
About this color
#1B489D is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.147 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 8.53:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.46:1 |
| White text | 8.53:1 |
Values
| HEX | #1B489D |
| RGB | rgb(27, 72, 157) |
| HSL | hsl(219, 71%, 36%) |
| OKLCH | oklch(42.4% 0.147 261.6) |
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 #1B489D | 8.53:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #1B489D | 2.46:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #1B489D text on white | 8.53:1 | AAA | Lc 88.8 | Fine for body text |
| #1B489D text on black | 2.46:1 | Fails | Lc -13.4 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A2C1F9
oklch(80.8% 0.087 262)
-
Step 400
400
#6F9FF6
oklch(70.6% 0.138 261.6)
-
Step 500
500
#4A84F2
oklch(63% 0.176 261.8)
-
Step 600
600
#2C6BE1
oklch(55.6% 0.191 261.5)
-
Step 700
700
#2058C3
oklch(49% 0.178 261.7)
-
Step 800
800 (this color)
#1B489D
oklch(42.4% 0.147 261.6)
-
Step 900
900
#1C3E7D
oklch(37.6% 0.114 261.4)
-
Step 950
950
#112549
oklch(27% 0.072 261.1)
#1B489D 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) | #0353A0 | 0.029 |
| Deuteranopia (no green cones) | #00479B | 0.014 |
| Tritanopia (no blue cones) | #005D6B | 0.114 |
| Achromatopsia (no color) | #4C4C4C | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B489D
#1B489D
oklch(42.4% 0.147 261.6)
- #664800
#664800
oklch(42.3% 0.087 81.3)
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 #1B489D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Sapphire #2138AB ΔE 0.044
- Dusk Blue #26538D ΔE 0.045
- Light Navy #155084 ΔE 0.050
- Blueberry #464196 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.062
Use #1B489D 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.