#103F9A
Closest named color: Sapphire (#2138AB). oklch(39.9% 0.157 261.9), rgb(16, 63, 154).
Aa
White text reads best on this color (9.54:1).
About this color
#103F9A is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.157 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.033 away. White text reads best on it, at 9.54:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.19:1 |
| White text | 9.54:1 |
Values
| HEX | #103F9A |
| RGB | rgb(16, 63, 154) |
| HSL | hsl(220, 81%, 33%) |
| OKLCH | oklch(39.9% 0.157 261.9) |
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 #103F9A | 9.54:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #103F9A | 2.19:1 | Fails | Lc 12.6 | Not readable |
| #103F9A text on white | 9.54:1 | AAA | Lc 91.4 | Preferred for body text |
| #103F9A text on black | 2.19:1 | Fails | Lc -11.0 | 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 900.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4182FF
oklch(63.1% 0.198 261.8)
-
Step 600
600
#0B61FF
oklch(55.5% 0.246 261.9)
-
Step 700
700
#0050DD
oklch(49.2% 0.225 261.8)
-
Step 800
800
#0041B7
oklch(42.8% 0.195 261.8)
-
Step 900
900 (this color)
#103F9A
oklch(39.9% 0.157 261.9)
-
Step 950
950
#082256
oklch(27% 0.1 262.1)
#103F9A 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) | #004C9D | 0.034 |
| Deuteranopia (no green cones) | #003F98 | 0.008 |
| Tritanopia (no blue cones) | #005666 | 0.120 |
| Achromatopsia (no color) | #454545 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103F9A
#103F9A
oklch(39.9% 0.157 261.9)
- #5D4200
#5D4200
oklch(39.8% 0.082 82.1)
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 #103F9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.033
- Cobalt #1E488F ΔE 0.034
- Twilight Blue #0A437A ΔE 0.056
- Blueberry #464196 ΔE 0.062
- Light Navy #155084 ΔE 0.063
- Dusk Blue #26538D ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.069
- Deep Sea Blue #015482 ΔE 0.075
Use #103F9A 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.