#102F4E
Closest named color: Prussian Blue (#1D3557). oklch(30% 0.067 251.1), rgb(16, 47, 78).
Aa
White text reads best on this color (13.64:1).
About this color
#102F4E is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.067 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 13.64:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.53:1 |
| White text | 13.64:1 |
Values
| HEX | #102F4E |
| RGB | rgb(16, 47, 78) |
| HSL | hsl(210, 66%, 18%) |
| OKLCH | oklch(30% 0.067 251.1) |
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 #102F4E | 13.64:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #102F4E | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #102F4E text on white | 13.64:1 | AAA | Lc 100.0 | Preferred for body text |
| #102F4E text on black | 1.53:1 | 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 950.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9BC5F3
oklch(81% 0.079 251.1)
-
Step 400
400
#60A5ED
oklch(70.7% 0.127 251)
-
Step 500
500
#2A8CE7
oklch(63% 0.163 251)
-
Step 600
600
#0075CE
oklch(55.7% 0.162 251.1)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900
#054377
oklch(37.8% 0.105 250.8)
-
Step 950
950 (this color)
#102F4E
oklch(30% 0.067 251.1)
#102F4E 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) | #21314F | 0.021 |
| Deuteranopia (no green cones) | #182B4D | 0.014 |
| Tritanopia (no blue cones) | #00363A | 0.051 |
| Achromatopsia (no color) | #2E2E2E | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #102F4E
#102F4E
oklch(30% 0.067 251.1)
- #422700
#422700
oklch(30% 0.065 70.3)
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 #102F4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Marine #042E60 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.041
- Midnight Green #073B4C ΔE 0.041
- Gunmetal #293241 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.046
- Marine Blue #01386A ΔE 0.053
Use #102F4E 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.