#1B527D
Closest named color: Deep Sea Blue (#015482). oklch(42.5% 0.091 246.1), rgb(27, 82, 125).
Aa
White text reads best on this color (8.23:1).
About this color
#1B527D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.091 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.013 away. White text reads best on it, at 8.23:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.54:1 |
| White text | 8.23:1 |
Values
| HEX | #1B527D |
| RGB | rgb(27, 82, 125) |
| HSL | hsl(206, 64%, 30%) |
| OKLCH | oklch(42.5% 0.091 246.1) |
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 #1B527D | 8.23:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #1B527D | 2.54:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #1B527D text on white | 8.23:1 | AAA | Lc 88.2 | Fine for body text |
| #1B527D text on black | 2.54:1 | Fails | Lc -14.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEC
oklch(88.6% 0.029 244.9)
-
Step 300
300
#A5C5E2
oklch(81% 0.054 245.9)
-
Step 400
400
#73A6D3
oklch(70.7% 0.086 246)
-
Step 500
500
#4D8FC7
oklch(63.1% 0.108 246.2)
-
Step 600
600
#2C78B4
oklch(55.5% 0.119 246.3)
-
Step 700
700
#1E659B
oklch(49.1% 0.11 246.1)
-
Step 800
800 (this color)
#1B527D
oklch(42.5% 0.091 246.1)
-
Step 900
900
#1D4565
oklch(37.8% 0.071 245.5)
-
Step 950
950
#12283B
oklch(26.9% 0.045 246.6)
#1B527D 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) | #3E547F | 0.037 |
| Deuteranopia (no green cones) | #304B7C | 0.026 |
| Tritanopia (no blue cones) | #005C61 | 0.065 |
| Achromatopsia (no color) | #4F4F4F | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B527D
#1B527D
oklch(42.5% 0.091 246.1)
- #6F4306
#6F4306
oklch(42.5% 0.091 66.9)
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 #1B527D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.013
- Light Navy #155084 ΔE 0.015
- Dusk Blue #26538D ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.035
- Cobalt #1E488F ΔE 0.046
- Twilight Blue #0A437A ΔE 0.049
- YInMn Blue #415A77 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.054
Use #1B527D 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.