#155099
Closest named color: Cobalt (#1E488F). oklch(43.7% 0.133 256.4), rgb(21, 80, 153).
Aa
White text reads best on this color (7.95:1).
About this color
#155099 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.133 and its hue 256°. 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 7.95:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.63:1 |
| White text | 7.95:1 |
Values
| HEX | #155099 |
| RGB | rgb(21, 80, 153) |
| HSL | hsl(213, 76%, 34%) |
| OKLCH | oklch(43.7% 0.133 256.4) |
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 #155099 | 7.95:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #155099 | 2.63:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #155099 text on white | 7.95:1 | AAA | Lc 87.1 | Fine for body text |
| #155099 text on black | 2.63:1 | Fails | Lc -15.0 | Dividers and decoration only |
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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6CA2ED
oklch(70.6% 0.125 256.8)
-
Step 500
500
#4289E7
oklch(63.1% 0.159 256.4)
-
Step 600
600
#1E71D6
oklch(55.7% 0.173 256.3)
-
Step 700
700
#0F5EB9
oklch(49.2% 0.16 256.3)
-
Step 800
800 (this color)
#155099
oklch(43.7% 0.133 256.4)
-
Step 900
900
#174177
oklch(37.7% 0.103 256.3)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#155099 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) | #27579C | 0.026 |
| Deuteranopia (no green cones) | #004B98 | 0.018 |
| Tritanopia (no blue cones) | #00626D | 0.101 |
| Achromatopsia (no color) | #515151 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155099
#155099
oklch(43.7% 0.133 256.4)
- #6E4A00
#6E4A00
oklch(43.8% 0.092 76.9)
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 #155099, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Dusk Blue #26538D ΔE 0.026
- Light Navy #155084 ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.052
- Blueberry #464196 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.062
Use #155099 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.