#1258A8
Closest named color: Dusk Blue (#26538D). oklch(46.6% 0.144 255.6), rgb(18, 88, 168).
Aa
White text reads best on this color (7.03:1).
About this color
#1258A8 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.144 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.044 away. White text reads best on it, at 7.03:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #1258A8 |
| RGB | rgb(18, 88, 168) |
| HSL | hsl(212, 81%, 36%) |
| OKLCH | oklch(46.6% 0.144 255.6) |
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 #1258A8 | 7.03:1 | AAA | Lc -88.8 | Fine for body text |
| Black text on #1258A8 | 2.98:1 | Fails | Lc 20.2 | Dividers and decoration only |
| #1258A8 text on white | 7.03:1 | AAA | Lc 83.8 | Fine for body text |
| #1258A8 text on black | 2.98:1 | Fails | Lc -18.2 | Dividers and decoration only |
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 700.
-
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
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A3C3EE
oklch(80.9% 0.07 255.9)
-
Step 400
400
#71A3E5
oklch(70.7% 0.111 255.7)
-
Step 500
500
#498ADE
oklch(63% 0.144 255.8)
-
Step 600
600
#2A72CC
oklch(55.5% 0.156 256)
-
Step 700
700 (this color)
#1258A8
oklch(46.6% 0.144 255.6)
-
Step 800
800
#1A4E8F
oklch(42.7% 0.121 256)
-
Step 900
900
#1C4272
oklch(37.8% 0.093 255.6)
-
Step 950
950
#112743
oklch(27.1% 0.059 255.4)
#1258A8 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) | #2A60AB | 0.030 |
| Deuteranopia (no green cones) | #0053A6 | 0.017 |
| Tritanopia (no blue cones) | #006B78 | 0.107 |
| Achromatopsia (no color) | #595959 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1258A8
#1258A8
oklch(46.6% 0.144 255.6)
- #795100
#795100
oklch(46.7% 0.098 76)
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 #1258A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.056
- Cobalt #1E488F ΔE 0.056
- Peacock Blue #016795 ΔE 0.058
- Light Navy #155084 ΔE 0.060
- Dusky Blue #475F94 ΔE 0.062
Use #1258A8 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.