#155F84
Closest named color: Light Navy Blue (#2E5A88). oklch(46.1% 0.091 236.4), rgb(21, 95, 132).
Aa
White text reads best on this color (6.99:1).
About this color
#155F84 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.091 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.024 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #155F84 |
| RGB | rgb(21, 95, 132) |
| HSL | hsl(200, 73%, 30%) |
| OKLCH | oklch(46.1% 0.091 236.4) |
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 #155F84 | 6.99:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #155F84 | 3.00:1 | AA large text | Lc 20.2 | Dividers and decoration only |
| #155F84 text on white | 6.99:1 | AA | Lc 83.8 | Fine for body text |
| #155F84 text on black | 3.00:1 | AA large text | Lc -18.1 | 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 700.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A6C6DA
oklch(81% 0.045 235.5)
-
Step 400
400
#75A8C7
oklch(70.7% 0.071 235.8)
-
Step 500
500
#4F92B9
oklch(63.2% 0.09 236.1)
-
Step 600
600
#2F7BA5
oklch(55.5% 0.098 236.7)
-
Step 700
700 (this color)
#155F84
oklch(46.1% 0.091 236.4)
-
Step 800
800
#1E5573
oklch(42.8% 0.075 236.4)
-
Step 900
900
#1F465D
oklch(37.7% 0.059 237.1)
-
Step 950
950
#132936
oklch(26.9% 0.037 236.3)
#155F84 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) | #4D5F86 | 0.053 |
| Deuteranopia (no green cones) | #3E5583 | 0.042 |
| Tritanopia (no blue cones) | #00696C | 0.058 |
| Achromatopsia (no color) | #595959 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155F84
#155F84
oklch(46.1% 0.091 236.4)
- #7E491F
#7E491F
oklch(46% 0.091 56)
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 #155F84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.024
- Peacock Blue #016795 ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.036
- Denim #3B638C ΔE 0.037
- YInMn Blue #415A77 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.042
- Dusk Blue #26538D ΔE 0.042
- Petrol #005F6A ΔE 0.046
Use #155F84 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.