#155398
Closest named color: Dusk Blue (#26538D). oklch(44.4% 0.128 254.7), rgb(21, 83, 152).
Aa
White text reads best on this color (7.71:1).
About this color
#155398 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.128 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.021 away. White text reads best on it, at 7.71:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.72:1 |
| White text | 7.71:1 |
Values
| HEX | #155398 |
| RGB | rgb(21, 83, 152) |
| HSL | hsl(212, 76%, 34%) |
| OKLCH | oklch(44.4% 0.128 254.7) |
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 #155398 | 7.71:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #155398 | 2.72:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #155398 text on white | 7.71:1 | AAA | Lc 86.3 | Fine for body text |
| #155398 text on black | 2.72:1 | Fails | Lc -15.8 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C4F1
oklch(81% 0.075 254.2)
-
Step 400
400
#6BA3EA
oklch(70.6% 0.12 254.9)
-
Step 500
500
#408AE3
oklch(63% 0.153 254.7)
-
Step 600
600
#1A72D1
oklch(55.5% 0.166 254.7)
-
Step 700
700
#095FB5
oklch(49% 0.155 254.7)
-
Step 800
800 (this color)
#155398
oklch(44.4% 0.128 254.7)
-
Step 900
900
#164275
oklch(37.8% 0.099 254.5)
-
Step 950
950
#0E2744
oklch(27% 0.062 253.9)
#155398 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) | #2E599B | 0.028 |
| Deuteranopia (no green cones) | #114D97 | 0.018 |
| Tritanopia (no blue cones) | #00646E | 0.097 |
| Achromatopsia (no color) | #535353 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155398
#155398
oklch(44.4% 0.128 254.7)
- #714A00
#714A00
oklch(44.2% 0.093 74.5)
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 #155398, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.021
- Cobalt #1E488F ΔE 0.032
- Light Navy #155084 ΔE 0.033
- Deep Sea Blue #015482 ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.045
- Peacock Blue #016795 ΔE 0.060
- Twilight #4E518B ΔE 0.061
Use #155398 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.