#15547D
Closest named color: Deep Sea Blue (#015482). oklch(42.8% 0.091 242.6), rgb(21, 84, 125).
Aa
White text reads best on this color (8.08:1).
About this color
#15547D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.091 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.011 away. White text reads best on it, at 8.08:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.59:1 |
| White text | 8.08:1 |
Values
| HEX | #15547D |
| RGB | rgb(21, 84, 125) |
| HSL | hsl(204, 71%, 29%) |
| OKLCH | oklch(42.8% 0.091 242.6) |
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 #15547D | 8.08:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #15547D | 2.59:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #15547D text on white | 8.08:1 | AAA | Lc 87.6 | Fine for body text |
| #15547D text on black | 2.59:1 | Fails | Lc -14.5 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C5E1
oklch(80.8% 0.054 243.3)
-
Step 400
400
#70A7D2
oklch(70.7% 0.086 242.9)
-
Step 500
500
#4791C6
oklch(63.2% 0.109 242.4)
-
Step 600
600
#227AB3
oklch(55.7% 0.119 242.6)
-
Step 700
700
#13669A
oklch(49% 0.111 243.1)
-
Step 800
800 (this color)
#15547D
oklch(42.8% 0.091 242.6)
-
Step 900
900
#1A4564
oklch(37.6% 0.071 243.3)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#15547D 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) | #41557F | 0.043 |
| Deuteranopia (no green cones) | #324C7C | 0.031 |
| Tritanopia (no blue cones) | #005E63 | 0.062 |
| Achromatopsia (no color) | #505050 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15547D
#15547D
oklch(42.8% 0.091 242.6)
- #72420C
#72420C
oklch(42.8% 0.092 62.3)
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 #15547D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.011
- Light Navy #155084 ΔE 0.019
- Dusk Blue #26538D ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.033
- YInMn Blue #415A77 ΔE 0.049
- Cobalt #1E488F ΔE 0.050
- Twilight Blue #0A437A ΔE 0.053
- Petrol #005F6A ΔE 0.054
Use #15547D 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.