#1B449C
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.151 262.8), rgb(27, 68, 156).
Aa
White text reads best on this color (8.92:1).
About this color
#1B449C is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.151 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.025 away. White text reads best on it, at 8.92:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #1B449C |
| RGB | rgb(27, 68, 156) |
| HSL | hsl(221, 70%, 36%) |
| OKLCH | oklch(41.5% 0.151 262.8) |
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 #1B449C | 8.92:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #1B449C | 2.35:1 | Fails | Lc 14.1 | Not readable |
| #1B449C text on white | 8.92:1 | AAA | Lc 89.9 | Fine for body text |
| #1B449C text on black | 2.35:1 | Fails | Lc -12.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A2C1FA
oklch(80.9% 0.088 262.4)
-
Step 400
400
#719EF8
oklch(70.6% 0.141 263.1)
-
Step 500
500
#4C83F5
oklch(63.1% 0.181 262.9)
-
Step 600
600
#3069E4
oklch(55.6% 0.197 262.9)
-
Step 700
700
#2357C6
oklch(49.1% 0.182 262.7)
-
Step 800
800 (this color)
#1B449C
oklch(41.5% 0.151 262.8)
-
Step 900
900
#1E3D7F
oklch(37.7% 0.118 263)
-
Step 950
950
#12244A
oklch(26.9% 0.075 263.2)
#1B449C 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) | #00509F | 0.032 |
| Deuteranopia (no green cones) | #00449A | 0.014 |
| Tritanopia (no blue cones) | #005A69 | 0.117 |
| Achromatopsia (no color) | #4A4A4A | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B449C
#1B449C
oklch(41.5% 0.151 262.8)
- #624600
#624600
oklch(41.4% 0.085 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 #1B449C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Sapphire #2138AB ΔE 0.037
- Blueberry #464196 ΔE 0.051
- Dusk Blue #26538D ΔE 0.053
- Light Navy #155084 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
- Deep Sea Blue #015482 ΔE 0.067
Use #1B449C 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.