#103F53
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.7% 0.06 230.7), rgb(16, 63, 83).
Aa
White text reads best on this color (11.30:1).
About this color
#103F53 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.060 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.017 away. White text reads best on it, at 11.30:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #103F53 |
| RGB | rgb(16, 63, 83) |
| HSL | hsl(198, 68%, 19%) |
| OKLCH | oklch(34.7% 0.06 230.7) |
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 #103F53 | 11.30:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #103F53 | 1.85:1 | Fails | Lc 8.1 | Not readable |
| #103F53 text on white | 11.30:1 | AAA | Lc 95.8 | Preferred for body text |
| #103F53 text on black | 1.85:1 | Fails | Lc 0.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C7D9
oklch(81% 0.045 230.4)
-
Step 400
400
#71A9C5
oklch(70.6% 0.071 230.8)
-
Step 500
500
#4793B7
oklch(63% 0.092 231.3)
-
Step 600
600
#227DA3
oklch(55.5% 0.1 231)
-
Step 700
700
#126A8B
oklch(49.2% 0.092 229.8)
-
Step 800
800
#145671
oklch(42.6% 0.077 230.6)
-
Step 900
900 (this color)
#103F53
oklch(34.7% 0.06 230.7)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#103F53 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) | #353E54 | 0.041 |
| Deuteranopia (no green cones) | #2C3853 | 0.034 |
| Tritanopia (no blue cones) | #004446 | 0.034 |
| Achromatopsia (no color) | #3A3A3A | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103F53
#103F53
oklch(34.7% 0.06 230.7)
- #52301B
#52301B
oklch(34.7% 0.06 51.4)
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 #103F53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.017
- Midnight Green #073B4C ΔE 0.018
- Charcoal #264653 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.037
- Onyx #343A40 ΔE 0.048
- Gunmetal #293241 ΔE 0.049
- Dark Teal #014D4E ΔE 0.051
Use #103F53 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.