#1A57AF
Closest named color: Dusk Blue (#26538D). oklch(47.1% 0.154 258.5), rgb(26, 87, 175).
Aa
White text reads best on this color (6.93:1).
About this color
#1A57AF is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.154 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.055 away. White text reads best on it, at 6.93:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #1A57AF |
| RGB | rgb(26, 87, 175) |
| HSL | hsl(215, 74%, 39%) |
| OKLCH | oklch(47.1% 0.154 258.5) |
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 #1A57AF | 6.93:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #1A57AF | 3.02:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #1A57AF text on white | 6.93:1 | AA | Lc 83.5 | Fine for body text |
| #1A57AF text on black | 3.02:1 | AA large text | Lc -18.5 | 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
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F1
oklch(80.8% 0.074 259.3)
-
Step 400
400
#72A2EA
oklch(70.8% 0.118 258.3)
-
Step 500
500
#4C88E4
oklch(63.1% 0.153 258.7)
-
Step 600
600
#2E70D2
oklch(55.6% 0.165 258.6)
-
Step 700
700 (this color)
#1A57AF
oklch(47.1% 0.154 258.5)
-
Step 800
800
#1D4D93
oklch(42.8% 0.127 258.3)
-
Step 900
900
#1D4075
oklch(37.6% 0.1 258.6)
-
Step 950
950
#122645
oklch(27% 0.064 258.9)
#1A57AF 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) | #1F61B2 | 0.028 |
| Deuteranopia (no green cones) | #0053AD | 0.017 |
| Tritanopia (no blue cones) | #006C7A | 0.117 |
| Achromatopsia (no color) | #5A5A5A | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A57AF
#1A57AF
oklch(47.1% 0.154 258.5)
- #785300
#785300
oklch(47% 0.098 78.8)
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 #1A57AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.055
- Mid Blue #276AB3 ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.057
- Cobalt #1E488F ΔE 0.063
- Blue Blue #2242C7 ΔE 0.063
- Light Navy Blue #2E5A88 ΔE 0.066
- Peacock Blue #016795 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.068
Use #1A57AF 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.