#607F99
Closest named color: Grey Blue (#647D8E). oklch(58.3% 0.054 244.2), rgb(96, 127, 153).
Aa
Black text reads best on this color (4.99:1).
About this color
#607F99 is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.054 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.017 away. Black text reads best on it, at 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.99:1 |
| White text | 4.20:1 |
Values
| HEX | #607F99 |
| RGB | rgb(96, 127, 153) |
| HSL | hsl(207, 23%, 49%) |
| OKLCH | oklch(58.3% 0.054 244.2) |
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 #607F99 | 4.20:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #607F99 | 4.99:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #607F99 text on white | 4.20:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #607F99 text on black | 4.99:1 | AA | Lc -32.7 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE1
oklch(88.4% 0.013 244.3)
-
Step 300
300
#B4C3CF
oklch(80.9% 0.024 242)
-
Step 400
400
#8DA4B7
oklch(70.7% 0.038 243.2)
-
Step 500
500
#708DA6
oklch(63% 0.05 244.7)
-
Step 600
600 (this color)
#607F99
oklch(58.3% 0.054 244.2)
-
Step 700
700
#48647B
oklch(49% 0.05 243.8)
-
Step 800
800
#3C5264
oklch(42.8% 0.04 243.6)
-
Step 900
900
#334452
oklch(37.8% 0.032 243.6)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#607F99 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) | #747F9A | 0.026 |
| Deuteranopia (no green cones) | #6D7999 | 0.023 |
| Tritanopia (no blue cones) | #4D8587 | 0.044 |
| Achromatopsia (no color) | #7B7B7B | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #607F99
#607F99
oklch(58.3% 0.054 244.2)
- #92755A
#92755A
oklch(58.3% 0.053 64.4)
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 #607F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.017
- Stormy Blue #507B9C ΔE 0.024
- Slate Gray #708090 ΔE 0.025
- Battleship Grey #6B7C85 ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.032
- Off Blue #5684AE ΔE 0.032
- Steel Grey #6F828A ΔE 0.033
- Steel #738595 ΔE 0.033
Use #607F99 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.