#1B4893
Closest named color: Cobalt (#1E488F). oklch(41.6% 0.133 260.1), rgb(27, 72, 147).
Aa
White text reads best on this color (8.76:1).
About this color
#1B4893 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.133 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.007 away. White text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #1B4893 |
| RGB | rgb(27, 72, 147) |
| HSL | hsl(218, 69%, 34%) |
| OKLCH | oklch(41.6% 0.133 260.1) |
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 #1B4893 | 8.76:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #1B4893 | 2.39:1 | Fails | Lc 14.4 | Not readable |
| #1B4893 text on white | 8.76:1 | AAA | Lc 89.6 | Fine for body text |
| #1B4893 text on black | 2.39:1 | Fails | Lc -12.7 | 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
#E1EAF9
oklch(93.5% 0.023 260.7)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A4C2F4
oklch(81% 0.078 260.5)
-
Step 400
400
#72A1EE
oklch(70.8% 0.124 259.9)
-
Step 500
500
#4D87E8
oklch(63.1% 0.159 260.1)
-
Step 600
600
#306ED7
oklch(55.6% 0.174 260.3)
-
Step 700
700
#225BBA
oklch(49% 0.162 260.2)
-
Step 800
800 (this color)
#1B4893
oklch(41.6% 0.133 260.1)
-
Step 900
900
#1E4078
oklch(37.8% 0.104 259.9)
-
Step 950
950
#122646
oklch(27.1% 0.065 259.4)
#1B4893 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) | #1A5096 | 0.022 |
| Deuteranopia (no green cones) | #004692 | 0.016 |
| Tritanopia (no blue cones) | #005A66 | 0.103 |
| Achromatopsia (no color) | #4B4B4B | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4893
#1B4893
oklch(41.6% 0.133 260.1)
- #644600
#644600
oklch(41.6% 0.086 80.6)
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 #1B4893, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.007
- Light Navy #155084 ΔE 0.036
- Dusk Blue #26538D ΔE 0.037
- Twilight Blue #0A437A ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.049
- Blueberry #464196 ΔE 0.052
- Sapphire #2138AB ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.058
Use #1B4893 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.