#12508F
Closest named color: Dusk Blue (#26538D). oklch(42.9% 0.12 253.2), rgb(18, 80, 143).
Aa
White text reads best on this color (8.17:1).
About this color
#12508F is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.120 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.018 away. White text reads best on it, at 8.17:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #12508F |
| RGB | rgb(18, 80, 143) |
| HSL | hsl(210, 78%, 32%) |
| OKLCH | oklch(42.9% 0.12 253.2) |
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 #12508F | 8.17:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #12508F | 2.56:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #12508F text on white | 8.17:1 | AAA | Lc 87.8 | Fine for body text |
| #12508F text on black | 2.56:1 | Fails | Lc -14.3 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4EE
oklch(80.9% 0.071 253.2)
-
Step 400
400
#6DA4E5
oklch(70.7% 0.112 253.4)
-
Step 500
500
#428CDD
oklch(63.1% 0.143 252.8)
-
Step 600
600
#1E74CB
oklch(55.6% 0.156 253.1)
-
Step 700
700
#0E61B0
oklch(49.2% 0.145 253.2)
-
Step 800
800 (this color)
#12508F
oklch(42.9% 0.12 253.2)
-
Step 900
900
#174272
oklch(37.6% 0.095 253.7)
-
Step 950
950
#0F2742
oklch(26.9% 0.059 253.1)
#12508F 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) | #305591 | 0.030 |
| Deuteranopia (no green cones) | #174A8E | 0.017 |
| Tritanopia (no blue cones) | #005F68 | 0.089 |
| Achromatopsia (no color) | #4F4F4F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12508F
#12508F
oklch(42.9% 0.12 253.2)
- #6D4600
#6D4600
oklch(42.8% 0.091 73.1)
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 #12508F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.018
- Light Navy #155084 ΔE 0.018
- Cobalt #1E488F ΔE 0.023
- Deep Sea Blue #015482 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.052
- Twilight #4E518B ΔE 0.063
Use #12508F 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.