#15488D
Closest named color: Cobalt (#1E488F). oklch(41% 0.126 257.5), rgb(21, 72, 141).
Aa
White text reads best on this color (8.96:1).
About this color
#15488D is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.126 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.007 away. White text reads best on it, at 8.96:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.34:1 |
| White text | 8.96:1 |
Values
| HEX | #15488D |
| RGB | rgb(21, 72, 141) |
| HSL | hsl(215, 74%, 32%) |
| OKLCH | oklch(41% 0.126 257.5) |
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 #15488D | 8.96:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #15488D | 2.34:1 | Fails | Lc 13.9 | Not readable |
| #15488D text on white | 8.96:1 | AAA | Lc 90.1 | Preferred for body text |
| #15488D text on black | 2.34:1 | Fails | Lc -12.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DBF5
oklch(88.6% 0.041 257.5)
-
Step 300
300
#A3C3F1
oklch(81% 0.074 257.4)
-
Step 400
400
#70A2EA
oklch(70.7% 0.119 257.5)
-
Step 500
500
#4A89E3
oklch(63.1% 0.151 257.6)
-
Step 600
600
#2B71D1
oklch(55.7% 0.164 257.5)
-
Step 700
700
#1D5EB5
oklch(49.2% 0.152 257.4)
-
Step 800
800 (this color)
#15488D
oklch(41% 0.126 257.5)
-
Step 900
900
#1C4175
oklch(37.8% 0.099 257.5)
-
Step 950
950
#112644
oklch(26.9% 0.062 257.5)
#15488D 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) | #204F90 | 0.023 |
| Deuteranopia (no green cones) | #00448C | 0.017 |
| Tritanopia (no blue cones) | #005963 | 0.098 |
| Achromatopsia (no color) | #494949 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15488D
#15488D
oklch(41% 0.126 257.5)
- #644300
#644300
oklch(41% 0.086 77)
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 #15488D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.007
- Light Navy #155084 ΔE 0.030
- Twilight Blue #0A437A ΔE 0.035
- Dusk Blue #26538D ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.042
- Blueberry #464196 ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.062
Use #15488D 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.